As mentioned here, for once I'd like to see well prepared soldiers, who know what they're up against, fight the Predators and Aliens and make rational, smart decisions. We see the Predators/Aliens adapt to the well prepared marines (mostly by cunning, but new weapons/ideas/sub-species can be introduced without going off the rails) and still get destroyed.
I'd like to see smart protagonists and villains fight by outsmarting each other and adapting to the circumstances. Enough with the dumb humans, predators and aliens.