Trivia: The Titans first encounter Slade while he's stealing a power crystal. They mistake him at first for the Marvel character, Deadpool and proceed to argue back and forth about him being Deadpool or not. With him saying that he's not Deadpool, that actually Deadpool should be saying he's not Slade. This is a joke and reference to the fact that the designer of Deadpool based his looks, abilities, and character originally off Slade/Deathstroke because he wanted to draw Deathstroke. Until Deadpool's backstory and personality were changed to what we know him as today.
Trivia: When Ralph and Venellope arrive in the internet they are bombarded with pop up ads. One of those ads features a picture of a woman with short brown hair. That woman is Aunt Cass from the Disney animated film, "Big Hero 6." In addition, Baymax from that movie makes a cameo appearance at, "Oh My Disney!"
Trivia: The animators created many small flaws in the film in order to emulate the looks of old comics. This includes color separation and a slight double-image effect in certain scenes to replicate imperfect comic-printing techniques. While the effect was intentional, many film-goers who saw the movie in 2D actually complained about these effects, thinking they were accidentally sold tickets to a 3D movie. (Especially due to the double-image effects).
Trivia: When Watson falls from a tower in the museum courtyard, he yells a Wilhelm scream.
Trivia: Will Friedle of Boy Meets World fame wrote a script similar to this film and sold it to Disney around 1997. They opted not to make the film. By the time this film was made, there were so many story revisions that Friedle could not get a story credit. A representative from the Writer's Guild of America even tried to intervene on his behalf, but Disney's rep claimed his script was completely different.
Trivia: There are several mid credit scenes in the film setting up characters for the follow up film, Rise of the Supermen. The first being the Superman Clone waking up and breaking out of Lex's lab, the second is John Henry Irons building his metal suit before taking up the mantle of Steel, the third is Superman's ship from when he was an infant flying to the north pole and creating the Fortress of Solitude with a mysterious figure dressed as Superman hovering before it, and the last being the Cyborg Superman flying towards the camera from space. (01:17:55 - 01:20:40)
Trivia: The way Donna attempts to get the bus stopped is a direct nod to the 1994 movie Speed. The bus driver is even named Sam, the same as the driver in that film.