Alien: Covenant, which serves as a prequel to his 1979 Alien movie, offers an origin story for the Xenomorphs, It’s an origin story that renders the crossover Alien vs. Predator movies obsolete.
The film teaches us that the Xenomorphs were not the product of a natural evolution; instead, the android David (Michael Fassbender) works out his god complex by genetically engineering the creatures and setting them loose on the ill-fated Covenant crew. Therefore, according to the timeline established by the new chapter, Xenomorphs enter the universe in the year 2104. Remember that year — it’s significant.
Between the 1986 sequel Aliens — James Cameron‘s blockbuster follow-up to Scott’s film — and David Fincher‘s 1992 installment, Alien 3, a new wrinkle was added to mythology: the Predator. The dreadlocked warrior had been introduced in the eponymous 1987 Arnold Schwarzenegger vehicle; 20th Century Fox, which produced Alien and Predator, licensed both properties to Dark Horse Comics. In 1989, the publisher did what comic-book publishers tend to do: Cross over the space monsters into a three-part series titled, yes, Aliens vs. Predator.
While the AvP comic books were flying off shelves, production was cooking on Predator 2. The effects team, which had worked on both Alien and Predator films and was aware of the comic book, decided, as an inside joke, to include a Xenomorph skull on a trophy wall inside the Predators’ spaceship, which is briefly glimpsed by Danny Glover’s hero in the film’s climactic moments. The idea was that the fearsome extraterrestrials had met earlier in some far-flung corner of the galaxy before arriving on 1990s Earth. And from that Easter egg, a shared cinematic universe was born.
In the early 2000s, with both franchises floundering, Fox green-lit the Alien vs. Predator movie, which fleshed out the Alien-Predator connection. The film, set in 2004, explains that Predators have visited the Earth for millennia, being worshiped as gods. Every 100 years, as a rite of Predator passage, they would bring alien “facehuggers” to infect human hosts. Their young warriors would then need to slay the resulting Xenomorphs to become a full-fledged hunter. While a critical disappointment (Scott, Cameron, and original star Sigourney Weaver also gave it a thumbs-down), Alien vs. Predator did well enough at the box office to trigger the 2007 sequel, Alien vs. Predator: Requiem, which continued the monster-on-monster smackdown.