Last month, the Avengers Endgame screenwriters revealed why Iron Man had to die and Captain America had to survive.

Speaking with Vanity Fair, McFeely said: "We realized over the course of the movies, that Cap and Tony were on crossing arcs.

"Cap, who had started as completely selfless and was jumping on grenades willy-nilly, was becoming more self-interested.

"Not to say selfish, but if you watch Civil War, particularly, he's making decisions based on what he wants, even if it breaks up the Avengers."

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