Vanessa Kirby as Sue Storm/Invisible Woman in 20th Century Studios/Marvel Studios' THE FANTASTIC FOUR: FIRST STEPS. Photo courtesy of 20th Century Studios/Marvel Studios. © 2025 20th Century Studios / © and ™ 2025 MARVEL.

Doctor Doom's reign of terror is just beginning. Here's what to know about his role in the upcoming movie, 'Avengers: Doomsday,' including cast, release date and potential plot.

Vanessa Kirby addressed questions about Robert Downey Jr. appearing in Marvel’s 'Fantastic Four: First Steps' post-credits scene

Yes, that mysterious cloaked figure in Fantastic Four is indeed played by Robert Downey Jr. – as confirmed by the director himself.

First Steps offers interesting insights into the ultimate villain who is set to appear in the MCU in Avengers: Doomsday.

A good chunk of Doomsday could focus on a clash between Avengers and X-Men with RDJ’s Doom cackling in the background, with a kidnapped Franklin by his side. The premise certainly gives the Fantastic Four a reason to breach their multiversal walls and zip over to 616 to meet the New Avengers.

Fantastic Four First Steps leaked scene gives a hint about the future of the four superheroes while drawing a bridge between this film and Avengers Doomsday, which also sets up Robert Downey Jr-starrer Doomsday.

Pedro Pascal, who has joined the MCU as Reed Richards / Mister Fantastic, reflected on how his character would respond to Robert Downey Jr’s Tony Stark / Iron Man. Pascal’s Reed will make his debut in the upcoming The Fantastic Four: First Steps and will also appear in Avengers: Doomsday.