I just read the AVP Novelization in two days and I have some comments and can answer some of the previous quentions along the way so if you are interested, here goe: ***MEGA SPOILERS****: There were seven predators - one in Cambodia that fights an Alien in a jungle during a back story in 2000 B.C.(this scene may be cut in the movie - replaced by preds at top of pyramid), one in 1904 in the whaling station that slaughters some guys (hint of that scene in one of the featurettes where the guy is on the floor of the cabin backing up), and five during the present day in the pyramid. There were two pred alien chestbursters, but none in the adult form. One bursts out in front of Lex and Scar and gets killed by Scar. And one which happened to start to (book only mentions his chest convulging) emerge from Scar after his dead body was honored and taken away on the pred spacehip. There were several Aliens involved in fights throughout the movie but never gave an exact number. But the end of the movie involved Scar and Lex escaping through the 2000 ft. ice tunnel while being pursued by hundreds of Aliens clawing up the sides, two of which were the Queen and the grid Alien riding on her back. The book never once mentions anything about the three preds on top of the pyramid fighting thousands of Aliens. The main Alien is the alpha Alien (Grid Alien) which is described as much bigger and meaner than the rest of the brood. The pred catching the chestburster is Scar and he is catching it after it bursts out of Sebastions chest. Lex shoots Sebastion in the head first though with a desert eagle. No blood in featurette. Maybe it will be CGI added. I hope! Some things that sucked: They don't mentioned anything of the predator vision in the book. It is hardly ever utilized. Same goes for the shoulder plasma cannons. Actually Scar uses it like once and that's it because he doesn't receive it until the end of the book. Some plot holes: There were many close fights between pred and alien that metion tons of Alien spilled blood. However, the acid rarely or never burns the preds except on a few occasions. And YES the alien acid eats through the armor. And NO the Pred blood does not neutralize the alien blood. Quinn falls 2000 feet down thew ice hole and scrapes along the side with his axe along the way, grabs a few cables, but somehow survives the fall. I found this to be stupid. Lex Jumping the chasm and somehow grabbing onto some small ledge that she clings onto...this happens way too much in movies. No one could ever hang on. And where the hell do the hundreds of Aliens come from!! The book never mentions this! Yes a few people get embryos implanted and I can see if there were at least 10 Aliens...but 100s!! Why the hell do all the Aliens start trying to eat their queen alive? They aren't cannibles!! I found this to be very stupid.