Trivia: The trivia and in jokes abound in this film. Firstly, you have Janet Leigh (Jamie Lee Curtis' mother) playing Norma (reference to Psycho) and complaining that the "showers are blocked again" (second reference to Psycho). In her last scene in the film, Janet Leigh is about to get into and drive away in the same car that she used in Psycho.
Trivia: In the end credits, an actor is credited as playing Young Ruafo. There are no scenes in the film which this character appears, this is a scene cut from the film, but they forgot to erase the credit. The explanation is that young Ruafo was filmed in the original Insurrection ending, before producers decided on a different (more action based) death for Ruafo and so had him burn on the exploding ship.
Trivia: Director Roland Emmerich was a massive fan of Spielberg's films. Particularly "Jurassic Park." Emmerich decided to model this film more around "Jurassic Park" than the original "Godzilla" series. (In particular the "Baby Godzilla" sequences, which features many callbacks and references to the raptor scenes from "Jurassic Park").
Trivia: Towards the end, where Soo Yun is reunited with her father outside of the museum, there is a news van in the background. The call letters on the van start with W, which is typically reserved for television and radio stations in the eastern U.S. with few exceptions. In the western U.S. of course, the calls typically start with a K. There is no "W" station currently broadcasting in Los Angeles.