Tony Stark unleashed his "most powerful creation" this year, upgrading the Iron Man suit in a way that's never been possible ...

The last few decades have been a time of feverish invention for Tony Stark's Iron Man, debuting several of his most powerful armors of all time. Here are the absolute best of the best since 1999 ...

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.