Robert Downey Jr. to star as Doctor Doom in new Avengers film

Robert Downey Jr, seen here in 2008's 'Iron Man', will be making his return to the Marvel Cinematic Universe as villain Doctor Doom. — Photos: Marvel Entertainment

Marvel Studios returned to San Diego Comic-Con with dancing Deadpool variants and a choir for a panel that included news about the next two Avengers films and surprise guests, including Harrison Ford and Robert Downey Jr.

Downey is returning to Marvel's films, but not as Iron Man. He'll play the villain Victor Von Doom, or Doctor Doom, in one of the upcoming Avengers movies. Downey kicked off Marvel's movie successes in Iron Man and played the popular character in nine films, but on Saturday appeared wearing Dr. Doom's mask and a green cloak.