?Avengers: Endgame? was the last cameo appearance for Marvel Comics co-creator Stan Lee. According to Comicbook.com, Kevin Feige was recently asked how much Lee knew about ?Endgame.? Feige said Lee never saw a cut of the film but knew significant details before filming his cameo. He said: ?Stan loved to wait to see the final movie at the premiere, so unfortunately he did not get to see the finished movie.