The Russo brothers were "convinced" they'd never return to the Marvel Cinematic Universe (MCU).
Siblings Joe and Anthony Russo are returning to the franchise to direct 'Avengers: Doomsday' and 'Avengers: Secret Wars', but it wasn't in their original plans as they thought they were ready for new challenges after helming 2019's 'Avengers: Endgame', their fourth film in the comic book world.