 Their investigation unknowingly activates an Alien egg production line as a hibernating Alien Queen is awakened within the pyramid.These events have all been orchestrated by Predators on a Predator mothership arriving in Earth orbit, as the pyramid is an ancient Predator training ground, where three Predators are to now fulfill a rite of passage.Descending down to the planet and entering the structure, they kill all humans in their way with the intention of hunting the newly-formed Aliens, while the explorers in the pyramid are scattered, those who aren't killed by the Predators being captured alive by Aliens and implanted with embryos.