Robert Downey Jr. is locked in for Avengers Doomsday, and has been giddily creating his Doctor Doom ahead of filming.
"He is so immersed in it. He is so dialed in," Joe Russo told Entertainment Tonight. “He’s writing backstory, costume ideas… We were just on the phone with him this morning before we got here talking about it. He just loves really rich three-dimensional characters. He sees a real opportunity here with the character."
