From a character POV, Ripley-8 probably wouldn't even care if the fools found the xeno-homeworld (if there is one - I prefer the Ridley Scott idea they they were engineered weapons.) I can't see even the original Ripley caring if another ship load of fools gets themselves killed; even if much of the original Ripley's memories came back, she's a different person and I she'd probably be even less concerned.
It was never about a random ship getting destroyed, though. It was always about preventing the Xenomorphs from escaping into the galaxy. It was about a greedy corporation/military trying to take the Xenos and use them as weapons.
True, Ripley-8 might not really care about the fate of humanity anymore, but I have to think that she would be incredibly curious about and drawn to the Xenomorph Homeworld.
Who's to say she doesn't already know all about it? She did get her genetic memory of the original Ripley from her Alien DNA, who's to say she doesn't also have the Alien race memories burred in there somewhere? She certainly had some of their senses and more than a little of their instincts. If not then I just can's see any amount of curiosity overriding her basic survival instincts. Going to a planet full of these things is death, guaranteed. This is a women who already died once because of these bloody things and I credit her with enough sense to stay the hell away from anything even remotely Alien looking.
As for them posing a threat to the galaxy, I just don't see it. While they're certainly intelligent, probably sentient, nothing we've seen indicates that the Xenos (the the likely exception of the "newborn") were ever sapient. Thus they can't actively spread to other worlds unless somebody takes them there.
All they can do is incubate as many hosts as are available, lay as many eggs as possible then go dormant until they're disturbed. They don't appear to have the foresight needed to develop beyond mere killing machines. They don't keep some of their hosts alive to breed new hosts like cattle, they don't build or pilot spacecraft and travel to other worlds. More to the point, since we know from the first Alien film they've been around for a very long time, if there are or were other xeno populations in the universe (it's possible that one ship had the only batch of eggs still in existance) and they had the capacity do develop sapience, then they'd have done so already and we'd all be dead by now.
At their very worst, all they'll ever be is the bio-mechanical equivalent of a virus or a natural disaster. Deadly, but manageable. With the human race spread across so many worlds, no one disaster would ever wipe out the whole race. Even if some corporation or government is dumb enough to remove samples and inflict them on a large population (accidentally or otherwise), I doubt anyone will be dumb enough to let to happen a second time. If a planet colony, or ship gets infested, all everyone else has to do to protect themselves is either a simple quarantine, or nuke them from a safe distance.
I'm not saying they should include those backstories from AvP. I'm just saying they shouldn't intentionally contradict them by giving the Xenos a different origin.
Why not? They were shite. Who cares if something else contradicts them?
). As for the proposed Scharzenegger/Aliens film I'm not sure if James Cameron was maybe having us on in that respect, post Aliens his films tended to be a lot less gung-ho and a lot more thoughtful for good or ill
