20 Actors Returning For Upcoming Movie Sequels

There's simply no upcoming sequel return more shocking than that of Robert Downey Jr. in Avengers: Doomsday.

After all, Downey's iconic Tony Stark died a deeply affecting sacrificial death at the conclusion of Avengers: Endgame back in 2019, seemingly bringing his tenure as the figurehead of the Marvel Cinematic Universe to a fitting conclusion.

While many expected that Downey would return as an Iron Man variant in Avengers: Secret Wars, just about nobody anticipated that he would come back in the film before this, Avengers: Doomsday, as another character entirely.

At last year's San Diego Comic-Con, Marvel Studios announced that Downey would be playing supervillain Doctor Doom in Doomsday - a jaw-dropping revelation which left Marvel fans the world over absolutely shook.

Some were excited, others saw it as a desperate move on Marvel's part, but nobody knows the precise nature of Downey's role - is he playing a Tony Stark variant who has taken the guise of Doctor Doom, or is he straight-up playing a traditional iteration of Victor von Doom with no multiversal tricks?

As ever, we'll have to wait and see. 

The potential for messiness is huge, but if the Russo brothers pull it off, they'll have the MCU's first mega-hit in a good while on their hands.