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: In the end credits the minion causing the screen to drop has heterochromia iridum - his eyes are two different colors. (01:30:45)
Trivia: When The Joker interrupts the ceremony and shows the video of him blowing up the building, there's a scene where he hits the detonator a few times before the building blows up. This is a scene paying homage to what happened in The Dark Knight when there was an actual unplanned delay during filming of the explosion going off during the blowing up of the hospital.
Trivia: After the ending credits, there is an additional scene showing an alien invasion appear from a temporal rift. This is likely an homage to the upcoming movie, Justice League: War, which is the story of the Justice League first forming in order to combat an alien invasion. (01:20:50)
Trivia: When Flint Lockwood's Party-in-a-Box goes off during an Inventor Presentation, two Wilhelm Screams can be heard.
Trivia: In the batcave, the batmobile lifted by Bruce is the design from Tim Burton's Batman and Batman Returns films.
Trivia: The monkeys in the newspaper look exactly like the monkeys from Madagascar, another Dreamworks movie.