Trivia: There's a statue of the alien from Independence Day on top of the computer monitor in the broadcasting booth at the Madison Square Garden. (01:44:25)
Trivia: Stan Lee makes a cameo appearance in the beginning of the movie when Jean is being recruited and showing off her powers. He is the man holding a hosepipe. (00:02:50)
Trivia: When the grandchildren and Grant are crawling above the drop-down ceiling to flee from the raptors, the raptors at one point have "squares" of light shining on them. If you look closely at this light, these "squares" of light are not really squares, but the letters A T C G, the DNA sequence abbreviations.
Trivia: Brendan Fraser has a brief uncredited role as Sgt. Stone, during Duke's and Ripcord's training. (00:31:05)
Trivia: When Crichton talks to "Harvey" (Scorpius in his head) for the first time in the movie, Scorpius is dressed like Einstein. There is a blackboard with equations on it. One of them is "e = MC hammer". (00:21:30)
Trivia: Pom Klementieff, who plays Mantis in the Guardians of the Galaxy films, also directed by James Gunn, has a cameo here as one of the patrons inside the club on Corto Maltese.
Trivia: The Anabelle doll from The Conjuring, another film of director James Wan, is visible while Mera is taking Arthur to her submarine ship. Blurry but there.
Trivia: Stan Lee makes his customary appearance when Rocket Raccoon is sweeping the plaza for likely targets - he is seen chatting up a young lady. (00:16:00)
Trivia: Does anyone recognize the guy who was eaten by the T-Rex in San Diego? It was the screenwriter of Jurassic Park and The Lost World, David Koepp.
Trivia: While Mr. Freeze is at Shaugnessy's, when Shaka smacks Dick across the room, he ends up flat on his back, and in the close-up when Dick raises his head, the buttons on his vest switch sides momentarily. Then the buttons revert back (noted in trivia because it's better when clicked through slowly). (00:24:25)
Trivia: Stan Lee, who co-created the Hulk, and Lou Ferrigno, who played him in the 70's TV show, have cameos as a pair of security guards in the beginning of the film. Ferrigno later made another cameo as a security guard in the 2008 reboot.
Trivia: Steven Spielberg has a cameo as one of the doctors when Elliot and E.T. are 'hospitalized' inside the house.
Trivia: Spider-Man creator Stan Lee makes his standard cameo appearance for this film when Spider-Man and Doc Ock are fighting on the side of the building. The first shot of the street during the fight shows a woman being pushed out of the way as some debris falls; the man pushing her is Lee.