Robert Downey Jr.'s potential return as Tony Stark's Iron Man in Avengers: Secret Wars would still stick to his one condition for reprising the role, according to a new MCU theory. Robert Downey Jr. debuted as Tony Stark in 2008's Iron Man, kicking off the MCU with a bang, and setting himself up as the face of the franchise for the following decade. Iron Man sacrificed his life in 2019's Avengers: Endgame, using the six Infinity Stones to eliminate Thanos and his army, and save the universe, but this might not be the end of Robert Downey Jr.'s MCU career.
https://screenrant.com/iron-man-avengers-6-return-meet-rdj-condition/