Robert Downey Jr. is making a surprise return to Marvel as Doctor Doom in 'Avengers Doomsday.' Here's how that's possible and what else to know about the film.

Tech Insider
Joe Russo, Robert Downey Jr. with a fist raised up and Anthony Russo stand together at San Diego Comic Con in July 2024.
Joe (left) and Anthony (right) Russo are returning to direct the next "Avengers" film, while Robert Downey Jr. will play the main villain.

Jesse Grant / Getty Images for Disney

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