I'm sure I won't get any agreement but I'll say Alien Versus Predator (the first one, not that God-awful second part). Yes, it's not a scare-fest like Alien, it has a very comic book feel to it (but hey, it was based on a comic book series that came out around 1989 or 1990), and it adds nothing to the existing Alien or Predator movies ... but like the original King Kong versus Godzilla (another one for this list, actually), the movie works for me.

