Robert Downey Jr. Is Writing DOCTOR DOOMS Backstory

While promoting Netflix's The Electric State, Joe and Anthony Russo have been rumored to return to the Marvel Cinematic Universe for the next two Avengers films.

The filmmakers were asked by ET about Robert Downey Jr.'s shocking announcement that he would play Doctor Doom in Avengers: Doomsday. Anthony said the actor has "immersed himself" in Doom and is writing his backstory.

"He's writing backstory, costume ideas... he just really loves rich three-dimensional characters, and I think he sees a real opportunity here."