Breakaway Pop Hit: The movie was a critically panned failure, but its soundtrack album - featuring the Wallflowers' cover of David Bowie's "Heroes", Jamiroquai's UK #1 single "Deeper Underground" and Puff Daddy's "Come with Me" - flew off the shelves.
Enforced Method Acting: Matthew Broderick's terrified reaction to the baby Zilla bashing its head through the elevator near the climax was genuine. In the Japanese-only "The Art of Godzilla" by creature designer Patrick Tatopoulos, it was because the puppeteers had mistimed the doors closing. The baby Zilla had already had computer reactions programmed into it, and "could care less if the puppeteers mistakenly closed the doors early - it went through the steel-framed aluminum doors, ripping them apart as if they were made out of paper!"
Fan Nickname: The Godzilla of this movie is commonly called G.I.N.O. (Godzilla In Name Only) and Zilla (which it was later officially renamed) to distinguish it from the "real" Godzilla.
The movie could have been Ronald Emmerich's intent to kill off the Godzilla franchise because he openly hated the real Godzilla.
Ironically, this movie actually helped save the Japanese franchise. Toho intended to retire Godzilla after Godzilla vs. Destoroyah, at least until the series' 50th anniversary. But after seeing how badly this movie performed, Toho brought Godzilla back one year later in Godzilla 2000.
Hey, It's That Voice!: Bart Simpson (Nancy Cartwright), Ned Flanders (Harry Shearer), and Moe (Hank Azaria) all appear through the film, two of them playing major roles in the events of the movie. One can hardly doubt that the nod was intentional.
Star-Derailing Role: Maria Pitillo. It was supposed to be her big breakthrough role to major audiences, but her performance received lots of criticisms for being one of the reasons why the film failed to resonate and as a result, pretty much retired just a few short years later.
The original script for the movie had Godzilla being far more like his Japanese self and he was supposed to fight a shape-shifting monster called the Gryphon. Due to the financial success of Independence Day, however, TriStar decided that they wanted their own disaster movie to compete, and so hired Roland Emmerich to direct.
After that Godzilla was actually going to battle King Ghidorah. However, at the time, Toho sold the rights to kaiju from the series separately, so Tristar would have had to pay even more money. Since the budget was already astronomical, that was out of the question.
Here is one of the ideas the filmmakers had for a sequel.