They basing it on the general comic storyline that Aliens are now being bred so that Predators can use for hunting both for fun and as a Ritual into Adulthood. Unfortunatly humans get in the way and a bunch of stuff happens, but usually, Predator fight Alien, Predator injured by Aliens, Human save Predator, Predator follows code of honour help Human, Human and Predator fight Alien, Human survives, Predator kills itself to save Human...but theres always an egg left. fade to black - possible and most likely a squel will follow