Despite Ridley Scott's denials, the presence of the Space Jockey from the original Alien hints that Xenomorphs will have to appear in some form or other. After all, in "Alien," the crew reports that the Space Jockey's chest was penetrated from the inside out. Really, what else could have happened to him? We may not see the classic scorpion-like Xenomorphs we know and love, but they have to appear at some point towards the end.