True, that was just a point raised I'd never thought of. She would have had the same sort of motivation to 'go after' Aliens as Ripley had in ALIENS - to get it out of her system, mainly pshycologically.
It still would have been nice to see a NEW hero in the Alien franchise. I've seen a few Alien5 fan posters here and there and one had Arnold in it. Pure fanboy fantasy of course.
By the way, maybe I should post this bit in an AVP area, but having watched AVP recently I think the woman with the white hair, who you see a chest burster come out of, would have been a really cool alternative to Lex as the hero. She even has a shot where she turns to the camera (when she asks 'what did you say this chamber was called?') in a mirror image of the exact same shot of Arnold in Predator. People more familiar with Predator probably picked that out too. If not I'll try to remember exactly where Arnold does it, I think its with his conversation with Billy.