.Wonder is delivering the Russo Bros. back to direct the next 2 Avengers films The VergeRobert Downey Jr. Sets Marvel Return as Winner von Doom in 'Avengers: Doomsday' VarietyRobert Downey Jr. To Formally Return To The MCU As Physician Doom Forbes' Avengers' superstar Robert Downey Jr. returns to Wonder-- but as Medical Professional Doom U.S.A. TODAYMCU's Physician Doom Appointed finally for Avengers: End ofthe world, and It's Robert Downey Jr. |SDCC 2024 IGN.