I'm prefer a story outside earth... in some planet, which originally appears to be a large scale hunting ground.
the entire planet is hunting ground between xenomorph and several Predator's clan, who sent their representative for the game. Colonial Marine, human, doesn't know about this, and landed on the planet as this planet has similarity with earth in nature.
The climax will be battle between the yautja's clans , clash with humans, and finally they need to work together to fight their primary nemesis, the xenomorph. the Xenomorph will rely on their numbers as ussually , but I prefer that the real danger is coming from a group xenomorph drone (being a classic xenomorph) that apparently exceptional far more clever and cunning than their rigged warrior counterpart, more, every of them excell in different skill. The predator doesn't realize it, until several of their clans is massacred. In the other side , the predators who also have their main cast, a group of veteran and skilled warrior. So I want to see how they fight between a clever and cunning xenomorph versus a veteran and skilled predator in single or tag team melee combat. Too much for the predator's surprise, rather than relying on their sheer number, a single xenomorph is proved to be a match or more for a single veteran predators. For human, it will be a survival mission.