-A revolutionary and technologically advanced crime-fighting suit is replicated (and modified to be more lethal), by a former friend/partner of the suit's inventor, who has ambitions to sell the technology to people with nefarious purposes, expressly against the wishes of the inventor.
-In an effort to protect this from happening, and protect someone he loves, the hero must use the suit beyond its expected capabilities to defeat the villain, resulting in the villain's death as his own suit is destroyed.
-The hero is endangered by the technology he uses (Obadiah extracts from Tony Stark's breast the mechanism that prevents the shrapnel inside his blood from arriving at his heart to kill him, and Scott Lang uses the special system of the suit to defeat Cross, reducing his size to enter in the Quantum Realm).
-The hero trains to use the suit with comic results (Tony Stark crashes sometimes while he constructs the first armor, and Scott Lang increases his size before the right time, crashing against the ground).
-A woman turns into the assistant of the hero (Pepper Potts for Tony Stark, and Hope Pym for Scott Lang).
-Love interest between the hero and his assistant (Tony Stark and Pepper Potts, Scott Lang and Hope Pym).
-Both movies also end with the implication that the heroes' actions have earned them consideration for joining the Avengers.
-The main villain of the movie is bald (Obadiah Stane in Iron Man, Darren Cross in Ant-Man).
-The villain dies by the suit he creates (Stark collapses Stane's armor, who falls to crash against the Arc Reactor of the laboratory, and Lang collapses Cross's armor, who vanishes in the Quantum Realm).
-Presentation of a hero for a sequel (War Machine in Iron Man, The Wasp in Ant-Man).