Also, IF (and this is a big IF) Fox maintained part of the script regarding the prologue fight in the Pred ship, somehow the fight will provoke a breach in the hull and precipitate the ship onto Earth, killing everyone in the ship, including the Predalien, but somehow having a Predator surving and sending the distress call that will attract another Predator, already stationed on Earth or in the vicinity, to conduct a manhunt of the Aliens at large... This is what transpired from the first draft, which the Strause bros, stated was abandoned, but at least this part remains the only way the ship could fall onto Earth from what transpired at the end of AVP... The rest is unknown, though for sure, the sewers fight scene was maintained (see picture of Alien-Pred in the sewers...)...so who knows what else was maintained, if not all of it...? Notice what Fox and the Strause bros.say is not to be taking int consideration, being them aiming at selling the product and all...