Tony Stark succumbed to his quest for heroism in Avengers Endgame, but for all that, his legacy in the MCU is not what Iron Man deserved.
While fans are still hoping Robert Downey Jr. (Iron Man) can return to the MCU, the character has gone to superhero heaven forever. Throughout the films, Tony Stark has been seen to go from haughty and pompous scientist to the best defender on the planet, desperate to stop the villains of this world. We know that during Phase 4 and following, the shadow of Iron Man will haunt the remaining protagonists for a long time. Whether by his technological inventions, his link with Peter Parker but also by everything he was able to bring to his friends, the lack of Tony Stark will necessarily be felt. The problem is that Marvel Studios does not seem to have fully understood the importance of his heritage, that of his family.