Prometheus - Spoilery thread of Spoilers

RooneyFan wrote:

Oh and just so I am clear, is the consensus here that the "Xenomorphs" that we see in Alien only the result of the Human DNA from Shaw and the Engineer DNA from that subsequent empregnation, from the Large squid. But that wouldn't fit with the Alien incident, and maybe the Xeno's are whats happens when the bugs infect any Engineer for the first time.

I wouldn't agree that this is the consensus. There is a very distinguishable image of the classic Xenomorph in the artwork in the room David unseals. It isn't clear, but I would guess this means that the black goop is engineered to evolve into that form.