One MCU theory could explain why Robert Downey Jr. is back to play Doctor Doom: Tony Stark was actually a Doom variant.

Doom's real power lies not in his newfound ... which is why he wears a mask not just to conceal his face, but also to hide his vulnerabilities. Read more of Doctor Doom's dastardly deeds in ...

The Russo brothers talked about the connections between Iron Man and Doctor Doom, and it's a great teaser for the Avengers: ...

The real Tony ... s scarred face and encouraged him to become something more than a tyrant. Doom took that challenge to heart. However, the world wasn’t ready for a heroic Doctor Doom.