Robert Downey Jr. Very Involved With Developing Character for 'Avengers: Doomsday'

Joe Russo On How Robert Downey Jr.’s Is Preparing For ‘Avengers: Doomsday’: “He’s Writing Backstory, Costume Ideas”

Robert Downey Jr. Is ‘So Immersed’ in Doctor Doom and ‘Writing Backstory’ and ‘Costume Ideas,’ Russo Bros. Say Ahead of ‘Avengers: Doomsday’ Filming

Robert Downey Jr. Transforms Into Doctor Doom In Epic ‘Avengers: Doomsday’ Concept Design