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.

Iron Man isn't afraid to be the underdog, boasting some of the strongest enemies in Marvel continuity - and they're always ...

Capable of manipulating weather, summoning thunder, and delivering devastating strikes, Mjolnir is almost as legendary as ...