Iron Man first debuted on-panel in 1963's Tales of Suspense #39 – written by Stan Lee, with art by Larry Lieber ... several variations of Iron Man suits, the movies don't go as in-depth on ...

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.