Doomsday concept poster blends the death of Iron Man in the MCU with the debut of the franchise's version of Doctor Doom.

Avengers' director Joe Russo recently revealed who had the genius idea to bring Downey back, not as Tony Stark, but as the Fantastic Four villain Doctor Doom.

In another recent interview with The Times, Anthony Russo confirmed Iron Man’s death in Endgame somehow tees up Robert Downey, Jr.’s return as Doctor Doom in Avengers: Doomsday. We can’t explain that as it’s part of the story. But there’s nobody else in the world who could play this character the way he’s about to.

Robert Downey Jr was introduced into Marvel Cinematic Universe with 2008 film Iron Man, and since then he is synonymous with the superhero character.

You may think it was the Russo brothers' idea to get Robert Downey Jr. to play Doctor Doom, but the directors revealed that initially, they had no interest in bringing Downey back as the Latverian dictator. Speaking to Omelete, Joe Russo said Downey tried to talk the filmmakers into directing him as Doctor Doom, and they initially refused.

Robert Downey Jr. was especially convinced to reprise his role of 'Iron Man' in the 2016 Captain America: Civil War.Directors and brothers Anthony and Joe Russo were confused and nervous

After a five-and-a-half-hour livestream that revealed Chris Hemsworth, Ian McKellen, Channing Tatum, and more would be in the movie via set chairs, the Iron Man star strolled into frame and sat on his own. He then looked over his right shoulder, put a finger to his lips, and shushed everyone tuning in.

"Avengers: Doomsday" finds brothers Joe and Anthony Russo back in the directors chairs. They return to Marvel having helmed the Captain America films "Captain America: The Winter Soldier" and "Captain America: Civil War," as well as "Avengers: Infinity War" and "Avengers: Endgame."