Predator 2
Written by the Thomas brothers, this film takes you way back to the 1990s. It might not be as good as the original with Arnold Schwarzenegger, but let’s give credit where credit is due. Just as the movie is coming to its peak, Harrigan, played by Danny Glover, has a little time to himself to wander around the ship before the big confrontation with the Predator.

Harrigan finds himself wandering around a trophy room filled with different kinds of skulls out on display on a large wall. To me, skulls all kind of look the same, even when they don’t. But if you look closely, you can see this oddly shaped skull, that definitely doesn’t look like something you have seen before – clearly belonging to the Xenomorph. Meaning that Alien and Predator exist in the same universe, years before their less-than-good joint movie aired.