- Primary Subject: Robert Downey Jr. (as Doctor Doom)
- Key Update: Robert Downey Jr. recently explained why he decided to return to the MCU as Doctor Doom.
- Status: Confirmed
- Last Verified: April 29, 2026
- Quick Answer: Robert Downey Jr. returned as Doctor Doom to explore a "very different" character, citing artistic growth and encouragement from Kevin Feige as primary motivations.
Robert Downey Jr. has finally explained why he decided to return to the MCU as the villainous Doctor Doom.
Two years ago, Marvel made the shocking announcement that the Oscar-winning actor is making his comeback in the MCU, not as Tony Stark, but as Doctor Doom instead, in the upcoming Avengers movies. To this day, fans are still wondering why he decided to return to the franchise years after his supposed exit.
Now, Downey is setting the record straight on his surprising decision.
Why Robert Downey Jr. Agreed to Return in the MCU
In a recent interview with Bran Ferren’s Conversations for our Daughters, Downey opened up about his decision to return to the MCU as Doctor Doom.
He explained that it stemmed from his desire to play a very different character and a way to show a different side of himself in the MCU that is far from Tony Stark.
"And so, again, what he really did was say, I want to go, I want to cast against type supposedly because I know that Downey’s as much a Strauss as he is a Tony Stark or whatever. So really, what it is too is sometimes the universe has this larger perspective, and someone says, ‘Hey, guess what? I think you can do this thing that people have never seen you do very well, and I’m betting on it,’" the actor said.
"And then you go, ‘Oh s**t.’ So then, there’s that sense of obligation that can be the mother of deformity. But I think also appreciation for validation is demonstrated in perspiration. So I worked my ass off to make sure that I was so prepared. Sidney Lumet would have been happy exactly with the way I showed up to set."
Downey continued, "Now I’m dipping my toe back in there, but I honestly feel like I’ve I don’t want to say I’ve earned the right to be able to be granted access where no actor for hire has been. But I’ve always had this thing where I’m kind of, even in Chaplin, it was about he transitioned from the silent era to talkies, or did he? Because really it was, but it was all to make The Great Dictator, which was possibly the most important statement of his entire artistic career."
"And now having played Tony Stark for all those years, I’m coming back into Marvel again. Without Lewis Strauss and without Nolan’s endorsement, it wouldn’t make as much sense to say, ‘Oh yeah, I’m going to hit that button again, but now I’m going to do it in this genre.’ But really, what’s interesting to me is digging into what happens backstage at the world, not being afraid of scale."
Based on his lengthy explanation, it looks like Downey had a more artistic reason behind his decision, and he is ready for the challenge to play a very different character that is far from what we've seen him do when he played Tony Stark.
What to Expect in the Upcoming Avengers Movies
The plot details regarding Avengers: Doomsday are still under wraps, but it is expected to feature a multiversal team-up between the heroes in Earth-616, the Fantastic Four from Earth-838, and the X-Men from the Fox universe against Doctor Doom.
The star-studded cast includes Robert Downey Jr., Pedro Pascal, Vanessa Kirby, Joseph Quinn, Ebon Moss-Bachrach, Chris Hemsworth, Anthony Mackie, Sebastian Stan, Paul Rudd, Letitia Wright, Simu Liu, Tom Hiddleston, Winston Duke, Florence Pugh, David Harbour, Wyatt Russell, Lewis Pullman, Hannah John-Kamen, Danny Ramirez, Tenoch Huerta Mejía, Patrick Stewart, Ian McKellen, Kelsey Grammer, James Marsden, Rebecca Romijn, Alan Cumming, Channing Tatum, and Chris Evans.
The film is slated for release in theaters on December 18. Four teaser trailers were already released, giving fans an early glimpse of what to expect.
As for Secret Wars, the details are still under wraps since production will begin this year. It is slated for release in theaters in December 2027.
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