In X-Men Apocalypse, the woman that Stan Lee is holding in his arms is his real wife, Joan Lee. It's the scene in which Apocalypse uses his powers to launch all the world's nuclear weapons into space, essentially disarming the entire planet.
In Avengers: Endgame, in the support group scene, the man wearing the glasses is Jim Starlin aka the creator of Thanos from the Marvel comics.
23Spider-Man: Into the Spider-Verse
Seth Rogan has somewhat of a cameo appearance in Spider-Man: Into the Spider-Verse.
24The Secret Life of Walter Mitty
In The Secret Life of Walter Mitty (2013), the wall behind Walter represents his colorful and creative mind, but quickly transitions to dark gray colors representing the dull work life.
In Steven Spielberg's Duel (1971), the exterminator car that David Mann mistakes for a police patrol car is called Grebleips Pest Control. Grebleips is Spielberg spelled backward.
In Spider-Man: Homecoming, Spidey jumps over a car while chasing the Vulture goons with a license plate of ASM-267. The Amazing Spider-Man 267 comic tells the story of Spider-Man in suburbia, which served as inspiration for this chase.
In the 1982 Tron movie, in one scene as the ship crosses the light beam path there is a huge Mickey Mouse head below it on the ground.
28Spider-Man: Far From Home
In Spider-Man: Far From Home (2019) one of the movies available for Peter in flight is "The Snap" directed by Paul Greengrass. Paul Greengrass is a real-life director responsible for "United 93", "Captain Phillips", "Bloody Sunday" among a few other dramatized films based on real-world events.
29Eternal Sunshine of the Spotless Mind
In Eternal Sunshine of the Spotless Mind (2004), titles of the books aren’t visible in the bookstore scene because Joel can’t remember all of those details.
30Return of the Jedi
There is a Mon Calamari who can't find his monitor in Return of the Jedi.