The Marvel Cinematic Universe has given us, over the course of 23 movies, the best representations on the silver screen of some of the most beloved Marvel characters. It’s to the point where very few casual fans can separate the character of Tony Stark from Robert Downey Jr., or Captain America from Chris Evans. The portrayals are that accurate. However, the men and women who work on Marvel Comics for a living sometimes nitpick details, as when famed writer Dan Slott pointed out this one flaw – to him – in Avengers: Endgame.