Robert Downey Jr. has officially announced his return to the Marvel Cinematic Universe, but this time as the iconic villain Doctor Doom, departing from his longtime role as Iron Man. The revelation was made during a lively San Diego Comic-Con panel, where Downey donned Doctor Doom's mask before unveiling his identity to an enthusiastic crowd. He will star in two upcoming Avengers films: 'Avengers: Doomsday,' set for release in May 2026, and 'Avengers: Secret Wars,' scheduled for May 2027. This marks Downey's first return to the MCU since the death of his character Tony Stark in 'Avengers: Endgame' in 2019. The Russo brothers, known for their direction of several major MCU films, will helm these new projects, signaling a potential return to the franchise's past glory amid recent struggles. Marvel Studios President Kevin Feige emphasized the studio's commitment to revitalizing the MCU through familiar faces and beloved characters.