A short appearance
Stan Lee is one of the creators of the Marvel comics publishing house and he is responsible for the creation of many important characters of this house as Spider-Man, Hulk, Iron Man, Avengers, X-Men and hundreds of others. He became the editorial director in the 60s. Since the early 2000s, he has mostly participated as a consultant in the creation of the Marvel Cinematic Universe. In particular, he has made a short cameo in each of the films produced by Marvel. In Guardians of the Galaxy vol. 2, when Yondu and Rocket use a machine allowing them to make great through the galaxy, we can see the ship make several pauses and in particular on a planet where we see Stan Lee with an old-fashioned astronaut suit in full conversation with three strange characters wearing long black dresses.