^Well, that's an in-joke that works in-universe, because it's entirely possible that someone could've created a holosuite program based on a classic 20th-century motion picture. It's no different from Data playing Sherlock Holmes on the holodeck.
Or somebody in the Peter David novels playing with the Marvel Universe characters on the holodeck.
Didn't Michael Jan Friedman write the Star Trek / X-Men crossover novel?
