Trivia: When King Triton enters the concert hall and passes over the audience, you can see Mickey Mouse, Goofy and Donald Duck sitting among the audience. (00:03:33)
Trivia: In the scene where Anna is outside the gates during "For The First Time in Forever", you can see the backs of Flynn and Rapunzel from "Tangled".
Trivia: The guest that was rejected at the party really was Stan Lee who helped popularize the Fantastic Four through writing the comic book for many years. This is actually from the comic book wedding of Reed Richards and Sue Storm (in the 60s) where a guest who looked like Stan Lee was turned away from the wedding.
Trivia: In the Fairy Godmother's workshop when Shrek dumps the cauldron of potion over the employees, two of them are transformed into Lumierre and Cogsworth from "Beauty and the Beast" (1991).
Trivia: When the Sultan is idly building a tower of miniature animal figures, one of the figures is the Beast from Beauty and the Beast. Also, the king crab the genie pulls out of his cookbook is Sebastian from The Little Mermaid.
Trivia: Susan Bones, who was sorted into Hufflepuff, is shown prominently throughout the film, even in some of the Gryffindor classes. The reason she is used so much is that she is actually Chris Columbus's daughter, Eleanor.
Trivia: In the beginning of the movie, when the candy store owner is singing the candy man song, there's a spot towards the end of the song where he lifts up his counter to let all the kids in. Watch the little blonde girl as she gets walloped in the chin by the counter. (00:04:30)
Trivia: When the taxi Jessica and Eddie are in hits the lamppost, she spins around and her dress shifts position. For a couple of frames on the laserdisc version her underwear vanishes, or at least it appears to. Opinion is divided as to whether it's a deliberate move by the animators or just an error in colouring. (https://www.snopes.com/fact-check/who-stripped-jessica-rabbit/). (00:18:15)
Trivia: When the Hobbits enter Bree, right after the wheel of the carriage passes in front of them, there is a man you see to the right who's holding a carrot and burps. That is Peter Jackson making a cameo appearance.
Trivia: When Danielle is with Gustave in his painter's studio, just as Gustave says, "Five days in the stocks," there's a painting of a noblewoman on the easel beside them; the noblewoman left her gown and jewelry at the studio for the painter to consult while completing her portrait, and it is that noblewoman's gown Danielle borrows to impersonate a courtier. Then, while Danielle is at the royal court quoting Utopia to Henry, right after she says, "but that you first make thieves and then punish them," in the next shot, the older noblewoman at the center is the one from the portrait; she's played by Amanda Walker, the wife of Patrick Godfrey who plays Leonardo, also in this scene. Amanda was to have a line in this scene (in the goldenrod script version), commenting on Danielle's gown being identical to her own, but that line was cut. (00:21:45 - 00:29:20)
Trivia: In the beginning of the film, young Sonic gives Longclaw a flower with spiky petals. This flower is actually based on a flower sprite from the original "Sonic the Hedgehog" video-game for the Sega Genesis. (00:02:16)
Trivia: Thanos' gauntlet bears a striking resemblance to the relic of the hand of St. Teresa de Jesus, one of the most important holy relics in Spain.
Trivia: When they power-up the Death Star, the control panel is a Grass Valley switcher, production equipment which is still prevalent in television stations everywhere.
Trivia: This is for the trailer rather than for the final film, but worth a look. At 1:33 in the trailer, just after seeing Rorschach slam someone against a wall, we see another fight. Pause it and look at the guy in black - he's holding a walkie-talkie, which in the next shot becomes a gun. This is only trivia, not a mistake, because it's only valid for the trailer. The MPAA don't allow guns to be pointed at the screen in trailers, so Zack Snyder, in a tribute to the infamous gun-editing from E.T., replaced the gun in that one shot with a walkie-talkie. (00:01:30)