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Avengers: Endgame (2019) Poster

Goofs

Jump to: Anachronisms (3)  | Character error (2)  | Continuity (13)  | Errors in geography (1)  | Factual errors (2)  | Incorrectly regarded as goofs (10)  | Plot holes (4)  | Revealing mistakes (1)  | Spoilers (31)

Anachronisms 

When Captain America enters the elevator to retrieve the staff from the Hydra Agents after the The Avengers in 2012, Jasper Sitwell is seen using a Samsung Galaxy S6 which was released in 2015. Even if SHIELD had more advanced gadgets than the rest of the world, there is still no possible way that Sitwell could have been using anything more recent than a Galaxy S3.
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The SHIELD employee describes one of the intruders as having a "hippie beard." The security guard asks if it was a "Bee Gees beard." While the Bee Gees were active in 1970, they had only one single on the U.S. charts that year and no one had any idea what they looked like, much less Barry Gibb's beard.
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While on the military base, a large cargo/personnel truck is seen. The tires are incorrect for the period. Correct tires would have been the skinny tires with duals on the rear. Super singles are seen, which were not used until the A1 series (first rebuilds/overhaul) of the 1982 trucks.
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Character error 

Rhodes lists several time travel themed movies in which someone changes the past and thereby changes the future. However, he mentions four movies that go against his argument:

  • He mentions Star Trek, whose time travel theory is actually very similar to this movie. When Spock Prime traveled to the past, all the changes made did nothing to affect his own timeline, however he still sought to make sure that the newly created timeline remained somewhat similar to his own.


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At time code 1:12:44, as Black Widow and Hawkeye are leaving Morag, Nebula is commenting on the coordinates for Vormir. During this line the side shot of her it appears that her right ear's make up is incomplete despite other shots surrounding these scenes showing her ear normally.
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Continuity 

After the Battle of New York in 2012, Captain America's uniform was very dirty and noticeably torn in several places (as seen in the first Avengers film), but here he is shown to have a pristine uniform after the battle.
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Scott is in the van trying a jump start, we then cut away and he is seen in the background battling a flying monster.
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In the very beginning of the film, Clint is teaching his daughter to shoot a bow and arrow and she hit the bulls-eye. Then Clint's family disappears after the snap, Clint looks around and the arrow is gone from the target but in the next shot, the arrow is back in the target.
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During the fight against Thanos, Captain America's shield is broken in half by the enemy's sword. However, when all the heroes arrive to the battlefield through the portals, the shield appears intact. It is shown broken again in the subsequent shots.
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At the SHIELD Army HQ in 1970, as Rogers signals for Stark that he is ready to leave, we see that Stark is speaking to his father, and as they speak, in the background there are two privates in dark uniform speaking to a officer wearing a beige uniform. As the camera switches between the senior and junior Starks, the privates are still there, but the officer appears and disappears alternatively.
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In Guardians if the Galaxy, Gamorra is searching for the orb and is not aware it is an Infinity Stone until The Collector tells her about 2/3 of the way through the film. In Avengers: Endgame, she says when we first see her that "Father has found an Infinity Stone" (referring to the orb on Morag). This scene takes place just before the beginning of the events in Guardians of the Galaxy, thus creating discontinuity between the 2 films.
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When Captain America, Black Widow and Ant-Man are having breakfast with Bruce Banner/Hulk at the diner, the breakfast burrito in front of Bruce is cut in half however in one cutaway scene to Captain America and Black Widow, the burrito is not cut in half and whole.
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When Ant-Man becomes giant and breaks through the rubble, he places Professor Hulk, War Machine and Rocket from his hand on the ground in front of him. But in the next wide-shot, Ant-Man is suddenly standing much further away from where the others are.
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As soon as they exit the hyperspace jump at about 15:30 into the film, you see Captain Marvel going down to the planet. Then the angle switches to Captain Marvel in front of the ship telling them that she is heading down to the planet for recon on Thanos.
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When Hawkeye's daughter is practicing archery with him she raises her elbow upwards when pulling back the bowstring instead of keeping it horizontal. Despite that she hits the target dead center and Hawkeye compliments her technique.
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When Ant-Man is visiting the Cemetery of the vanished, the name Norbert Lamey appears briefly on two different tombstones.
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In The Avengers (2012) when Agent Coulson gets out of Stark's elevator, the interior of the elevator shows that it has wood paneling and a horizontal metal crossbar. When they go back to the past, we get a scene that is set not more than a couple of days after this scene. The Battle of New York is over and the Avengers are victorious. The team is taking Loki,down to hand him over to S.H.I.E.L.D. and they pile into the same elevator, except this time we see a few differences. The interior wall of the elevator is quite different as is some of the set around it.
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After the successful time travel experiment, the Avengers begin to reassemble their team.

A Quinjet travels to Tokyo, where Ronin (Hawkeye) battles Akihiko, a Yakuza.

During the sword fight, the camera pans around the combatants; we see a cut visible under Akihiko's left cheek.

The fight continues, and the camera pans again; this time, the cut has disappeared.
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Errors in geography 

When Hulk and Rocket visit New Asgard to see Thor, the vehicle they arrive in has a UK-style registration plate but New Asgard is Norway (rear registration plates in the UK are yellow, but white in Norway). However, the actual registration used (SN615PN) is not a valid UK registration as the current format is two letters, two numbers, three letters. Nor is it a valid Norwegian registration which uses the format two letters, five numbers.
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Factual errors 

Stark mentions that he and Nebula got the Benatar running for 48 hours after fixing the engines, but the ship was now dead in space. This is impossible, since there is no gravity in space to slow the ship down. What would happen is the inertia of the 48 hour flight would keep the ship moving forever, or until either a planet's gravity caught them, or someone like Carol Danvers rescues them.
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Thanos strikes Captain America with the blade of his double-bladed sword, but the effect of this is a hit, making Cap fly, instead of a cut wound, as it would be with a sharp weapon like his.
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Incorrectly regarded as goofs 

Tony Stark drives an Audi e-tron gt, which is a fully electric concept car. When he arrives at the Avengers headquarters a loud combustion engine race car sound is heard. However, electric vehicles are a risk to visually-impaired pedestrians, and many countries have legislation requiring them to make a noise ; someone with Tony Stark's technical capability ( and ego ) may well have added a noise-generator which mimics a powerful engine.
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Thanos thinks he solved overpopulation forever, then destroys the stones and retires. But he just cut population in half once, it can grow back in just a few generations.

Thanos presumptuously believed that everyone would be grateful that he "saved the universe", which is made clear when he tell the Avengers that they "should be grateful" that he murdered trillions. Perhaps he expected everyone to express their gratitude by cutting down on reproduction in order to maintain balance.
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When Thanos magnifies the holographic reflection of Nebula it is not a mirror image.

However, in this particular shot, the camera is on the opposite side of the hologram from Thanos. Thanos would be looking at the holographic reflection of Nebula, which is a mirror image, but the camera is on the opposite side and would pick up the flipped image.
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The Army fatigue uniform that Steve Rogers is wearing while he and Tony are on the Army base in 1970 has his rank (Captain) correctly indicated on his cap as well as his right collar point. His left collar point has his service branch indicator, which, unfortunately, bears a resemblance to the LtCol rank. The branch indicator isn't clearly visible, but appears to be transportation branch. His uniform, rank and branch, are correct for the time period.
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In Avengers: Infinity War, it was mentioned that both Clint Barton (Hawkeye) and Scott Lang (Ant-Man) were placed under house arrest because they chose to return home to their families rather than join Steve Rogers in exile. In Ant-Man and the Wasp, Scott's house arrest sentence ended quite a bit of time before Thanos snapped his fingers. However, in this movie, Clint is still wearing his ankle tracker right at the time of the snap. If Clint and Scott were charged with the same crime, and given the same sentence, then their sentences should have ended at the same time, which means that Clint should have had his ankle tracker removed before the snap. It was never specifically stated what Clint's sentence was when he was placed on house arrest. It should also be noted that Clint freed Wanda from the Avengers compound in addition to aiding Steve Rogers in violation of the Accords, which stands as reason to believe Clint would receive a much longer sentence.
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Clint Barton/Hawkeye is ambidextrous, this is apparent from his appearance in Thor when he holds his bow in his left hand as opposed to his right which he does in The Avengers and onward.
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When Cap, Iron Man, Ant-Man and Hulk arrive in 2012 during the Battle of New York, the 2012 Avengers can be seen standing in a circle right before the scene cuts to the future Avengers arriving. Upon arriving, 2012 Hulk appears in their vicinity merely seconds upon them arriving. However, in The Avengers, the time it took for Captain America to relay his orders to the other Avengers was far longer than was depicted in Endgame. Especially since 2012 Cap gave his order for Hulk to "smash" last.

However, just because this is how the editing timed out like this in this movie, that doesn't mean that it happened in "real time" - it was most likely a jump cut from the 2012 Avengers team-up shot to the present-day Avengers to show up in 2012.
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When Scott is eating a taco, Rhodey lands next to him and accidentally blows the taco away. When Hulk comes around, he holds out two tacos for Scott, who is then only seen taking one. However, he could very well have chosen not to take the other.
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Retrieving the stones in the past would prevent crucial events from happening. However the movies sets that : a) Those pasts become alternate timelines, not affecting mainline present. b) They would return the stones to their timelines to not mess them up.
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Human hair grows on average six inches per year. Black Widow's hair would have grown far longer after the five year skip. However, it is perfectly possible that she could have simply cut her hair.
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Plot holes 

While the wizards created the shields to protect the Terran forces against the rain of fire from Thanos's ship, they should have created portals instead that would send the firepower back at the ship firing down upon the forces on the ground.
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In the second scene Tony Stark and Nebula are stuck on a stationary space craft, which has run out of fuel and air. Unless they deliberately stopped the craft, it would still be travelling in the same direction and at the same speed as when the fuel ran out, as there is no atmosphere in space and no appreciable gravity to slow the craft down. However, perhaps they realised that there was too little air to be able to drift back to earth or a planet where they could repair the hyperdrive of the craft and so decided to just end it all in space. It makes you wonder why they left Titan, if there was even the slimmest possibility of rescue.
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Scott Lang says that while the rest of the world lived through five years, he only aged five hours in the Quantum Realm. By that logic, then, someone who was in the quantum realm for thirty years should only have aged thirty hours, or one day and six hours. Janet Van Dyne has clearly aged more than that.
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Assuming Captain Marvel's powers work the same way that the light speed engine did (power came from the tesseract not herself) then when Thanos destroyed the stones her powers would disappear.
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Revealing mistakes 

After Barton stabs Akihiko with his sword, the camera pans out to reveal Black Widow watching. If one looks down at Akihiko, the actor (Hiroyuki Sanada) is visibly moving and breathing.
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Spoilers

The goof items below may give away important plot points.

Audio/visual unsynchronised 

As The Ancient One is about to hand over the Time Stone to Banner/Hulk, her back is to the camera. Her jaw is moving as though she's speaking but she isn't saying anything.
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Character error 

At the 2:18:58 mark, Cull Obsidian is seen being hit by a flying Mjolnir thrown by Captain America. However about 13 seconds later, he is seen again fighting Korg and Drax, nowhere near where he was initially.
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Continuity 

While Thanos is pushing Stormbreaker into Thor's chest, immediately after getting hit by Mjolnir, Stormbreaker in Thanos' hand changes into his double-bladed sword which was thrown far away as seen just before in the fight with Thor.
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When Professor Hulk is running through the first time travel tests with Ant-Man, Captain America is seen standing between Black Widow and Hulk. When the camera cuts to Ant-Man and back to Hulk, Captain America is now on Hulk's right hand side.
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Near the very end of the movie, one of the scenes shows Thor with a very short beard by comparison. The next scene with him on the GotG ship, his beard is normal length again.
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When the Ancient One pushes Bruce's astral body out of his physical, she still communicates with him normally without entering the astral dimension herself. In Doctor Strange, it was established that both people have to be either in the physical or the astral dimension together in order to maintain communication - this rule is obviously broken during Bruce's conversation with the Ancient One in this movie. The only exception to this rule is when the wizard in the astral dimension should break through into the physical dimension to make such conversation (like what Strange did to Christine), which Bruce clearly doesn't have the power to do. In addition, that same movie establishes that the astral dimension moves at a much faster time rate than the physical, yet Bruce and the Ancient One converse in real time.
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When Avengers attack Thanos in the Garden for the first time, right after Thor cuts off his left arm, Captain Marvel is choking Thanos while War Machine holds Thanos' right arm. At that time Thanos explains that the "Stones served no purpose, beyond temptation" and Bruce Banner in Hulkbuster gets mad yelling "You murdered trillions!" and in the next scene, less than half a second later, Bruce is seen pushing Thanos while seemingly nobody was holding him and they were standing at least several feet away.
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Ant-Man is working with the Wasp to restore power to the time machine in the van. At the same time, while Black Panther carries the Nano Gauntlet through the battlefield, we see a giant Ant-Man in the background fighting a Leviathan.
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When Captain America says: "(Avengers,)... assemble." in the final battle, Black Panther can be seen raising his right hand in the background. In the next shot, however, his hand is lowered when he charges.
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Incorrectly regarded as goofs 

A major plot point requires them to return the Infinity Stones back to right after they were taken, so as to not create new time lines.

But for almost every stone, it's going to be difficult, if not impossible, to return it without anyone seeing the difference - some stones were stored in containers that were broken, others were in artifacts that were destroyed to get to the stones.

Further, when Steve Rogers goes to return them, we very specifically see him with ONLY the stones, and not their original artifacts, or any way to repair the containers.

Apparently Steve must only deliver the stones to the moment they were taken from the past. Because as the Ancient One explained, the stones create the flow of time and removing one of the stones causes that flow to split. So Cap didn't have to (let's say) put the Aether back into Jane. As long as the Aether (reality stone) exists in that timeline, that's enough for the timeline not to split.
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There are two Infinity Stones on Asgard during the Time Heist: the Aether (Reality Stone) embedded in Jane Foster, and the Tesseract (Space Stone) in the vault. Given the volatile situation at the Battle of New York, it would have been much simpler to acquire the Tesseract from the vault. However given Thor's state of mind during the planning he's probably forgotten about the Tesseract being on Asgard. Plus it seemed easier to acquire three stones at once instead of two. Also who knows what kind of security Odin had for the Vault after the events of the first Thor film. In addition, as it is shown in the first Thor film, the Allfather Odin is able to sense intruders in his vault.
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Based on Peter Parker's description, everyone was revived at the location where they first disappeared. This would have been fatal for anyone who disappeared aboard an aircraft (or spacecraft), as their vehicles would no longer be at that location. It was later confirmed by the directors that, since Banner merged with Hulk, when he undid the snap that Thanos performed, he included that, when reviving, the other half of the population was placed in safe secure locations that would prevent their deaths.
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According to the film, altering the past would not change the future/present, but it would create a different timeline. However, at the end of the film when Captain America time travels to bring the stones back to their original location, he stays in the past with Peggy, and he remains in the same timeline - this should have created a new timeline.

The Russos confirmed the fact that Steve did indeed live in an alternate timeline - but how he made it back was intended to remain a mystery for now.
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In the final battle, Valkyrie is seen riding a Pegasus. Since Asgard has been destroyed and she has been living on Earth for many years, where did she get the Pegasus from? It is reasonable to presume the Pegasus are raised in one of the other Realms, or are constructs of the will power of the Valkyrie.
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In the after credits of Ant-Man and the Wasp (2018), Scott and Hope can clearly communicate with radio in the quantum realm without time delay, but in this movie, it is stated that 5 hours in quantum realm equal 5 years in normal time.

However, recall from that same scene is Ant-Man and the Wasp, Janet warns Scott to not get sucked up into a time vortex. After the time skip, where he evidently traveled through a time vortex, Scott mentions that the quantum realm is chaotic and unpredictable, and thus pitched the idea of "controlling the chaos" to make a time machine - clearly this shows that the 5 hours of quantum time wasn't directly proportional to the 5 years of real time that passed.
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Thanos wipes out 50% of the population in Infinity War - a society could survive this (and does). But when it is reversed, more than 5 years later, it is unlikely a civilization could survive the instant doubling of its population. A sudden influx of a small percentage of refugees moving across borders is seen to be catastrophic in the present day.

The population is more than doubled, since some births would have occurred in the intervening 5 years. They'd live at the same places, that they had five years ago. When Scott Lang makes it out of the quantum realm, he walks past rows of empty houses.

As for food, when the snap is undone, Scott sees birds suddenly appearing, suggesting that the snap extended to animals as well, which would now have doubled (supplying people with more to eat). fields on farms could be replanted, since with fewer people to feed, the fields would've been left to fallow. In Infinity War, Thanos notes that Gamora's planet had a surplus of food and resources, after he wiped out half of the population. Applying it to Earth, the world would've had a surplus of food, for the last five years. At worst, society would have to institute ration cards (as many countries did during the world wars), until more food can be produced.
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Tony's use of the stones is inconsistent with what was established in previous films, especially with regards to the power stone, which is capable of destroying whoever touches it almost instantly. Tony's gauntlets would have required substantial modification to protect him, and the Avengers are seen completing the fabrication of their gauntlet right before the Hulk uses it. There would be no time for Tony to replicate the gauntlet for his armor before the attack.

In previous films (more particularly Guardians of the Galaxy), it is established that only direct bodily contact with an infinity stone will cause that person to be destroyed, unless that person is a species that could withstand it (such as a Kree, Celestial, Titan, etc.). It's also established that any kind of weapon or gauntlet would allow the wielder to use the power of the stone(s). This being the case, Tony attaching the stones to his Iron Man gauntlet would have allowed him to use the stones (although still having a huge amount of energy flowing through him), but it is perfectly accurate that the energy was enough to kill him when he snapped his fingers.
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The car that Stan Lee is seen driving in 1970 is actually a 1971 Oldsmobile Cutlass, as evidenced by the tail lights being horizontal instead of vertical. But 1971 models were released in the fall of the previous year, so it is possible that Lee could be driving a 1971 car in 1970.
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Ant-Man warns the other Avengers that they only have enough Pym particles for a round trip to the past; the limited number of Pym particles is a key plot point to the time heist; in fact, Ant-Man wasted one Pym particle in an accidental size change. But, contrary to this limitation, the Avengers carried out more size changes: They miniaturized the Benatar spaceship, and Ant-Man changed his size multiple times in New York.

Previous movies with Ant-Man seem to suggest that the Ant-Man suit somehow has a permanently charged Pym particle, as he can shrink and grow at will. If not that, it is perfectly conceivable that it wouldn't require an entire canister of Pym particles for basic shrinking and growing, but it would require that much for quantum travel.

As of the Benatar, Ant-Man most likely had some shrinking and growth disks left over from his previous adventures with the Pym family, so it's most likely that he would have used a shrink disk on the Benatar and then gave Clint and Nat some more shrink and growth disks so that they could operate the Benatar in 2014 and then shrink it again for when they returned.
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Thanos being removed from 2014 would not prevent the events of Avengers: Infinity War, as The Ancient One clearly stated that making changes to the timeline creates other alternate timelines. When 2014 Thanos arrives in the present day (thanks to 2014 Nebula) this would create a time paradox - as Thanos no longer exists in the past the events of Avengers: Infinity War would not come to pass. Thanos would not be around to collect the Infinity Stones and the Snap would not happen. Akin to the 'Grandfather Paradox.' The other explanation for this is the events of Endgame create a slightly alternate timeline, whereby the events of the MCU remain unchanged and cannon while a new alternative timeline has been created in another reality whereby Thanos disappears from events in 2014 and the Infinity War storyline does not take place - similar to the conversation between Bruce Banner and The Ancient One. Another possible explanation is that, when the stones needed to be returned, Steve Rogers had to return them to almost the exact moments from whence they were stolen, which means that he would have returned the Power Stone to the moment in 2014 when Thanos and Nebula still existed.
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When Thor and Rocket are in the past discussing their mission, a disposable coffee cup with a lid can be seen next to Rocket while he is standing on a pillar. That's actually a beer can that Thor brought with him and placed there.
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Gamora died to get the soul stone in Avengers: Infinity War, but she is replaced with old-Gamora in Endgame and continues to live in that time line. If that's possible, the Avengers could also get Black Widow, Vision and Tony Stark back. Simply travel back to retrieve an old version of them and place them in the current time line. At the end of Endgame we see Hank Pym so the Pym-particles should not be a problem. Also, Captain America is travelling back anyway to put the stones back in their original time lines. He could have gotten all missing Avengers back, not just Gamora.

However, just because that theoretically could work, it wouldn't be the most ethical thing to do. The Ancient One mentioned that, although stealing an infinity stone would benefit the timeline of whoever took it, it would destroy the timeline from whence the stone was stolen. Bruce Banner was courteous enough to suggest the idea of returning the stones to exactly the moments from whence they were stolen in order to prevent those other timelines from splitting. Even though Captain America did successfully return the stones to those moments, that didn't change the fact that they still did a lot to undesirably change those timelines in the process of stealing the stones (more particularly 2012 Loki escaping with the Tesseract, or 2014 Thanos discovering 2023 Nebula and then traveling to her timeline). This being the case, if the Avengers used time travel to revive Vision, they would bring the mind stone with them and thus destroy whatever timeline they stole him from. As of the case of Black Widow and Iron Man, bringing them back wouldn't destroy those timelines, but it would drastically alter the fates of those timelines in which their crucial sacrifices to undo Thanos' actions wouldn't happen. Plus, they probably would have refused to be stolen from their timelines.
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While real-world issues prevented the appearance of the Marvel Netflix characters or the Agents of SHIELD, given the dire circumstances there's no reason why Doctor Strange would not have summoned them to participate in the final battle. Also, Nick Fury and Maria Hill are not present.

Strange is established as having seen the future and is attempting to ensure that they'll have the one future (out of over 14 million possible futures) where they win. The characters who were not there were not summoned, because Strange had not seen them there. They might have been there in some of the possible futures, where the heroes lost. Which would give Strange a motivation to not summon them.

It is also possible that some of those characters were actually present at the battle; we just didn't see them. After all, we saw dozens of portals open, some only from a distance.
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When present day Nebula kills past Nebula, Present day Nebula does not die. This is because it's stated that changing the past doesn't change your timelines future, but instead creates another timeline where the change made by time traveling is that timeline's future. Beside that, when Steve Rogers went back to return the stones, he would have returned the Power Stone to a point in 2014 where Nebula was still there and alive.
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The main events of the movie are stated as occurring 5 years after the snap. When the stranded Tony Stark is rescued by Captain Marvel and brought back to Earth, he does not appear to be in the state of mind to immediately start a family. Furthermore, the median time to pregnancy for couples under 37 years of age is 3 months. All that aside, even if Tony and Pepper were to get pregnant immediately upon Tony's return, there is still the prerequisite 9 months of gestation. Consequently, Morgan Stark could not be much more than 4 years old at the time of the main events. She appears to be (and the actress portraying her is) at least a year older than that.

In Avengers: Infinity War, Tony speculates that Pepper might already be pregnant. In Iron Man 3, we see them sleeping in the same bed (suggesting that they're already sexually active with each other). A pregnancy bump starts to show somewhere between 12 to 16 weeks, for first-time moms. So, Pepper could have already been pregnant for months (just have not informed Tony, yet), before Tony left Earth.
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The Eye of Agamotto was crushed by Thanos in Avengers: Infinity War. When Doctor Strange returns in the present, he is without it, but a minute later, just before Captain America says 'Avengers Assemble", The Eye of Agamotto seems to have briefly reappeared for a brief second. However, this is not the Eye of Agamotto. It is actually part of the sparks that are seen around the mystics' Tao Mandalas shields.
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Steve gets the radio call from Falcon before the portal opens. At this point, Falcon is still in Wakanda, on the other half of the world, way out of the radio contact range. However as show in Black Panther, Shuri created a pair of radio communicators with unlimited range for T'challa to use in his mission in Korea. Since Wakanda is now sharing it's resources with world and Captain America was granted amnesty its possible that T'challa provided this technology during the battle of Wakanda in Infinity War thus allowing Sam to reach Captain America on the radio.
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After the snap is undone, Doctor Strange brings every resurrected superheroes to the Avengers HQ. Everybody arrives from where they died in the previous movie. This is impossible, as Strange never even met most of them, not to mention knowing where the Wakanda battlefield or the rooftop where the Wasp died is.

Recall that Strange had foreseen 14,000,605 possible endings for the war against Thanos, with this movie's ending being the only possible way for Thanos to have been defeated. Strange inevitably knew about Wakanda because he already foresaw Thanos entering Wakanda to obtain the last stone and then snapping his fingers. In addition, since the snap was a universe-wide effect, the Time stone would have also shown Strange every single person across the universe who could have had a potential threat against Thanos (like Ant-Man, who provided the means to travel back in time and obtain the stones to snap everyone back into existence). This being the case, there is no possible way that Strange could have NOT known about everyone who showed up to battle at the end of the movie.
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When the old Steve Rogers appears in the park, there is no way he would be unnoticed for such a long time sitting there. For all they are concerned he is just an old man enjoying the lake, and is in no danger, so they just ignored him.
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Plot holes 

Multiple heroes have the fully assembled Infinity Gauntlet in their hands during the final battle, but nobody thinks about using it. Nor does anyone try to at least disassemble it, which would already prevent Thanos from repeating the snap. But it was established that using the Gauntlet would kill the wielder, so such a plan would be implemented only as a last resort.

Using the Gauntlet would kill a MORTAL wielder, as we see on Tony Stark. However, we see Professor Hulk, a mortal merely 'upgraded' by gamma radiation snapping with it and surviving it. Therefore we can safely assume that more advanced being could use it, like Thor, or Carol, who actually grabs it in the climax.
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Revealing mistakes 

Hulk claims there's a generator powering the experimental time machine and orders Black Widow to kill the power. When she opens the breaker it can be seen the equipment is actually an air conditioner, not a generator. In the final scene where Captain America is sent back in time, the same air conditioner can be seen "powering" the time machine.
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See also

Trivia | Crazy Credits | Quotes | Alternate Versions | Connections | Soundtracks

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