Robert Downey Jr. is officially returning to the Marvel Cinematic Universe (MCU), but not in the way fans might have expected. At the 2024 San Diego Comic-Con, it was revealed that Downey Jr. will portray the iconic villain Doctor Doom in the upcoming *Avengers: Doomsday* and *Avengers: Secret Wars* [[❞]](https://www.filmibeat.com/hollywood/news/2024/robert-downey-jr-returns-to-mcu-as-the-new-villain-doctor-doom-makes-the-entry-in-style-watch-011-409119.html).

This surprise return sees Downey Jr. stepping into a completely new role after the death of his original character, Tony Stark/Iron Man, in *Avengers: Endgame*. His portrayal of Doctor Doom, a complex and cunning antagonist, has already generated excitement among fans. Known for his charisma and ability to play layered characters, Downey Jr. seems like a perfect fit for the role. The announcement, accompanied by a dramatic unmasking in full Doctor Doom attire, thrilled audiences at the event [[❞]](https://www.filmibeat.com/hollywood/news/2024/robert-downey-jr-returns-to-mcu-as-the-new-villain-doctor-doom-makes-the-entry-in-style-watch-011-409119.html).

Directed by the Russo Brothers, who previously worked with Downey Jr. on *Infinity War* and *Endgame*, these upcoming films are set to be major additions to the MCU. Fans are eagerly anticipating Downey Jr.'s fresh take on Doctor Doom, which promises to bring new intensity to the multiverse saga [[❞]](https://www.filmibeat.com/hollywood/news/2024/robert-downey-jr-returns-to-mcu-as-the-new-villain-doctor-doom-makes-the-entry-in-style-watch-011-409119.html) .