Robert Downey Jr. is returning to Marvel's 'Avengers' films, but not as Iron Man

Robert Downey Jr. is set to return to the Marvel Cinematic Universe, as announced at San Diego Comic Con. He will portray Doctor Doom, a villain in upcoming Avengers movies. RDJ's role as Iron Man helped launch the MCU, which has since grossed over $30 billion. The excitement around Comic Con highlights its cultural significance.

What was revealed about Robert Downey Junior at San Diego Comic Con?

What character will Robert Downey Junior portray in the upcoming Avengers movies?

What role did Robert Downey Junior play in the Marvel Cinematic Universe?

How much has Marvel earned at the box office since Iron Man's debut?

What significant event is associated with San Diego Comic Con according to the text?