Trivia: During the big fight between Batman and Superman, a broken window has the same shape as Ontario, in Canada. Superman creator Joel Shuster was born in Toronto. The broken window is only ever shown from Superman's angle, not Batman's. This was confirmed by Zack Snyder as being a deliberate, if obscure, easter egg.
Trivia: Tim Burton makes a cameo in the fun park scene. He is the man with black frizzy hair and sunglasses on a ride that the hollow smashes into in a close-up.
Trivia: The sorcerors' WiFi password, Shamballa, is a reference to the 1986 Doctor Strange graphic novel "Into Shamballa."
Trivia: Amanda Waller operates out of the "John F. Ostrander Federal Building." John Ostrander is the comic book writer who reinvented the Suicide Squad using the concept of a supervillain team forced to do the government's bidding. The Suicide Squad title was originally a World War II comic, akin to the Dirty Dozen.
Trivia: The banker who turns down Jacob's first request for a loan is named Mr. Bingley, an obvious homage to one of the main characters in Jane Austen's Pride and Prejudice. J. K. Rowling has stated numerous times in interviews that Austen is her favorite author, and this is not the first time she has alluded to her works with a character name; Argus Filch's cat, Mrs. Norris, from the Harry Potter books and movies shares her name with the busybody character from Mansfield Park.
Trivia: Scarlett Johansson is the first woman to play Kaa the python.
Trivia: When Lockhart is in the sensory deprivation tank, the nurse that does a poor job of keeping an eye on him is reading "Der Zauberberg" by Thomas Mann, which obviously has at that point a common premise with the movie (the main character goes to a sanatorium in the Alps just as a visitor but ends up as an inmate). The novel was inspired by Mann's visit to his wife at a Swiss sanatorium which happened in 1912, same year as the picture fully unveiled in the finale.
Trivia: The film was originally written to be an introspective, existential dramedy geared towards adults about a troubled man who is turned into a cat. As originally planned, the cat also wouldn't speak/the audience wouldn't hear his thoughts. However, after a change in leadership at the studio, the film was rewritten into a more generic family movie.
Trivia: Jason Mewes was originally set to play the "Brahtzies", but had to drop out due to finding the makeup required for the roles far too claustrophobic.
Trivia: When a human warrior is pulled from his horse and thrown to the ground by an orc during the first battle between the orcs and the humans, he yells a Wilhelm scream.