.Marvel is bringing the Russo Bros. back to instruct the upcoming 2 Avengers films The VergeRobert Downey Jr. Sets Wonder Return as Victor von Doom in 'Avengers: End Ofthe World' VarietyRobert Downey Jr. To Formally Return To The MCU As Physician Doom Forbes' Avengers' star Robert Downey Jr. goes back to Marvel-- but as Medical Professional Doom USA TODAYMCU's Physician Ruin Cast finally for Avengers: End ofthe world, and also It's Robert Downey Jr. |SDCC 2024 IGN.