Kevin Feige just appeared on Marvel’s red carpet premiere stream for the Captain Marvel, and confirmed that the late great Stan Lee does have another cameo on the way beyond the one in Captain Marvel.
Talking about the tradition of Stan’s cameos he said:
“It became a national holiday when he was around on set, up through this movie and an upcoming one as well.”
He didn’t specific which movie he’d be in, but with Avengers: Endgame on the way and Spider-Man: Far From Home after that; it’s one of those two. Most people expect Avengers: Endgame to be his final cameo, and it would be fitting as that’s the culmination of the 21-movie series to this point.