Those are awesome ideas!!! I love it! I remember in AVP Extinction. The predator campaign had a mission where you had to go track down a disgraced predator that allowed itself to get captured and then kill it. That'd be a cool mission for the predators. And then retrieve it's tech. Or hunting down a bad blood and having predator vs predator!
As far as maps. A run-down factory would be cool. I like the power plant idea. Maybe there could be movie themed maps! Like the power plant scene from AVP-R or the predator camp from PREDATORS. The AI's could be other alien life and the pred-dogs. A map where it's raining would be cool, you'd have to think outside the box for the predator because the fire team would have the advantage. That night themed map idea is great too because then that gives the predator the advantage.
I think a snow themed map would be awesome too! Maybe an AVP movie themed map where humans find a temple and you have to stop them from escaping with the predator artifacts. The AI's could be xenomorphs!!
Sorry, I got carried away haha I just love this game! It's so fun! There are so many possibilities!