What they need to do is start over and make like Alien vs Predator... Evolution Chronicles or something so people know its not following the story of Requiem, and as we all know it should be set far in the future. And they need to stop hyping the Predalien its a natural part of AVP in fact its the only thing you can tell is gonna happen from just reading the title. If you have watched Alien and Aliens you know there life cycle, they take the enemies numbers and turn it to their advantage.
Breed Grow Domination
And the whole Predator temples it was a good idea don't get me wrong but "move on". The problem with setting it on earth is that the Aliens cant win how many of you would like to see a film were the Aliens win, I think it would be a nice change it is Aliens Vs Predator after all. Being a Candidate Alien can win, is a film where Predator's wins so out of the question either why is it that man must always win at everything are we that insecure as a species that we cant have a film were we lose.
I think a twist ending would be great e.g. a person emerges from the rubble as the only survive *sound of a Plasma Caster firing* The End or something like a facehugger jumps on to the screen. What I'm trying to say is give it something like the Deep Rising ending were they survived but they not in the clear just yet.