Robert Downey Jr.’s return to the MCU as iconic supervillain Doctor Doom will certainly take some explaining, but a new theory suggests Marvel Studios might have already introduced the perfect way to explain his dark turn. After over a decade spent playing Tony Stark’s Iron Man, and a five-year hiatus following his sacrifice in Avengers: Endgame, Robert Downey Jr. was confirmed to be returning to the MCU at this year’s SDCC presentation in July. Downey Jr.’s return as Doctor Doom has been controversial, but Marvel may already have the perfect explanation.