Originally, they wanted to call this movie Fox Force Five: And the Fantabulous Emancipation of One Harley Quinn. They couldn’t get Mia Wallace to reprise her role as Raven McCoy, mostly because Mia Wallace is a character from the Tarantinoverse and not a real person. Mostly.
Jason Mamoa plays the titular role in the movie Aquaman. This is a subtle nod to the racism that still exists in Hollywood. I mean, why else would they cast a man of Native Hawaiian ancestry as the worst superhero in the DCEU?
Aldus Dumbledore is much younger in this film despite it coming out after the Harry Potter series. This is because the filmmakers cast Jude Law in the part and the film is a prequel.
Fantastic Beasts and Where to Find Them does not tell where one can find magical creatures. This is a subtle nod to the fact that there are no fantastic beasts to be found.
Each movie in the Harry Potter series has a title in the form of Harry Potter and the [fill in the blank]. This is due to shrewd marketing. You see, Harry Potter makes an appearance in each film, as does the [fill in the blank].