Avengers: Endgame - 20 Things We Learned From The Director's Commentary

1. The End Credits Curtain Call Was Inspired By Star Trek

And finally, though Endgame sensibly concludes without any credits scenes to speak of, there is a neat treat for fans who stick around for a few minutes: a special curtain call for the O.G. Avengers, all of whom appear in a unique set of marquee credits accompanied by their signatures.

Joe Russo confirms that the idea came from Kevin Feige, who was homaging Star Trek VI: The Undiscovered Country, which similarly retired its principal cast at the end and had their signatures blast off into space. Neat.