Plus, why 'Doomsday' is the 'most mature' Marvel movie yet, says the Russos
While Robert Downey Jr. says the writers have solved Marvel's post-'Endgame' slump problem.
Robert Downey Jr. and Joe Russo are touring 'Avengers: Doomsday' as the most mature Marvel movie to date.
Robert Downey Jr, who is returning to the MCU with Avengers: Endgame, has said that the film is the only antidote to diluting the quality of the franchise. | Hollywood
'We labored long and hard,' Downey Jr. said.