Robert Downey Jr.'s Doctor Doom voice gave 'Avengers: Doomsday' directors chills

Robert Downey Jr. takes on the iconic villain Doctor Doom from the Fantastic Four comics in "Avengers: Doomsday", hitting theaters on December 18. The film's directors said his voice performance in the role gave them chills. The Oscar winner is returning to the MCU in a brand-new role after years of playing Iron Man.