The newsworthiness was share yesterday at San Diego Comic - Con .

Great news, Marvel fans!

After much teasing and speculation, Robert Downey Jr. confirmed that he’s officially returning to theMCU!

The actor previously played Tony Stark/Iron Man, appearing in nearly a dozen movies between 2008 and 2019 when he sacrificed himself inAvengers: Endgameto save the universe.

While he won’t be coming back as Iron Man (for now, at least), Robert will be returning to the MCU as Victor von Doom in two upcoming films — 2026’sAvengers: Doomsday and 2027’sAvengers: Secret Wars.

The Russo brothers, who will also return for the new films, revealed the news yesterday during Marvel’s panel at San Diego Comic-Con. Joe Russo had been teasing the casting for Doctor Doom when he said, “If we’re going to bring Victor von Doom to the screen…we are going to need the greatest actor in the world.”

He added, “As proof of the unimaginable possibilities of the Marvel Universe, we give you the one person who could play Victor von Doom.” At that moment, RDJ stepped forward wearing Doctor Doom’s iconic mask and cloak.

The full springy reveal of Robert Downey Jr. declare as Doctor Doom during the Marvel Studios Hall H panel at San Diego Comic - Con 2024.#SDCCpic.twitter.com / OlOJOQf0C4

“New mask, same task,” Robert said as the crowd cheered. He also shared an Instagram post of Doom’s legendary face covering with the same caption.

Here’s what people had to say about the announcement:

This was the best reveal

Finaly Iron mankind descend in a new avatar . Eagerly look .

Imagine his reaction when he meets Doompic.twitter.com/mHAvFi1MQq

Robert Downey Jr. smiles with his hands under his chin, wearing a sweater, shirt, tie, and black-rimmed glasses

I am genuinely so very confused .

All my ballyhoo instantly die . I love RDJ , but what the nookie ?

There were also some jokes:

The Avengers fighting Doctor Doompic.twitter.com/lpAhN0FFix

wonder Announcing RDJ as Doctor Doompic.twitter.com/xyggHidBuh

The Avengers when they see Doompic.twitter.com/xSS1E01Wuq

Robert Downey Jr. wearing a protective suit with "STARK" written on it, with a distressed expression and some dirt and cuts on his face

RDJ going from branding iron human being to Dr Doompic.twitter.com/DnqOAHY31n

me when the malefic iron man variant / doctor doom says “ I detest you 3000 ” in Secret Wars#SDCCpic.twitter.com / n4KffI10m1

When Peter Parker says “ I detest you 3000 ” to RDJ ’s Doctor Doom in Avengers Doomsdaypic.twitter.com/bIZCwzjccd

The Russo brothers and Kevin Feige stand in front of a large "Avengers: Doomsday" sign, flanked by people in hoods

me hear that tony stark is now dr doom after shedding organic tears when atomic number 26 military man diedpic.twitter.com/lbSU4B8YS7

When Dr. Doom reveals his side and looks like Tony Starkpic.twitter.com/2R4G92nPnv

Anthony Russo and Joe Russo on stage at San Diego Comic-Con, both holding microphones and wearing casual jackets

Tweet by user @HAWKGIRLS critical of MCU's creative direction, reacting to a tweet by @DiscussingFilm announcing Robert Downey Jr. to star as Doctor Doom in "Avengers: Doomsday," releasing in May 2026