Iron Man is one of the biggest superheroes in the Marvel Universe and one of the most resourceful. His life as billionaire playboy Tony Stark earns him several enemies, as does his armored alter ego.

Following is a transcript of the video. Narrator: If you look at Iron Man's first suit, the Mark 1, and compare it to the hero's nanotech suit from "Avengers: Endgame," a lot has changed.