Warning: this article contains spoilers for Avengers: Endgame!
Art Marcum and Matt Holloway are the writers behind the latest entry in the Men in Black series, Men in Black International. But they also happen to be responsible for the screenplay to 2008’s Iron Man. Both writers attended the MiB International red carpet premiere, where Marcum offered his thoughts on the climactic events of Avengers: Endgame and how far Tony Stark has come in the last decade.
While he didn’t work on Endgame (which was written by Christopher Markus and Stephen McFeeley), Marcum was adamant that Tony making a final, heroic sacrifice marked a fitting conclusion to an 11-year-long MCU character arc. He told IGN, “It’s sad, but it had to be that way.”
Source: IGN.com What Iron Man Writers Think of Avengers: Endgame's Treatment of Tony Stark