It's perfectly fine when it's planned into a sequel. It's one of the game's weak points - Amanda is just left hanging there in space and a light suddenly shines on her. Presumably, she's rescued. If no sequel is planned, then why not just spell it out fully instead of hinting at it? Complete the story, Goddammit! The ending of this game was its only real let down for me.
By the way, I'm still waiting to find out if that Pred ship caught up with the Verloc and find out what happened next. Especially considering 'AvP2' did have a follow up game - not a sequel, mind you - a follow up game.
Wouldn't it have been appropriate for 'AvP 2010' to be a sequel to 'AvP2' and show those events unfold? er, no. Apparently, a reboot was needed.
So if the sequels aren't going to happen, I wish developers would quit with the 'clever' endings and make the story finishes properly with a responsibility to deliver a satisfying conclusion.
Then again, I guess "We got everything!"
Sheesh.
-Windebieste.