Creator Killer: This ultimately became the final straw for newly-installed Disney CEO Ron Miller. He released Splash the next year under the new Touchstone label, but was dethroned by Paramount president Michael Eisner anyway.
Peter O'Toole and Christopher Lee were considered for the part of Mr. Dark.
Before production on the movie began, Don Coscarelli had hoped to adapt the book himself. Unfortunately for him, the rights had already been sold by that point. He ended up making Phantasm, which he has said took some inspiration from Something Wicked This Way Comes.