I think there are two ways at interpreting this speculation, firstly word came from within fox that the prequel had changed into a stand alone film a few weeks back, fox also shot down the rumours that there were creative differences between scott and tom rothman (fox head honcho) over the budget and age rating criteria for the film. Then when the statement was released by fox and scott about prometheus, scott states that alien was indeed the jumping off point for this film and fox state, it's a new film with the begining of a new universe, scott continues stating keen fans will notice strands of the alien dna in the film. Both fox and scott make a point of being ambiguous but at the same time distancing themselves from Scotts 1979 original and the franchise in general. Now, this week an article has appeared on the movie section of the sky website stating the space jockey section of the derelict craft has been rebuilt at Pinewood studios in the u.k. , and that a bigger form of the xenomorphs will be the antagonists of this film with some obvious differences as they are a different breed because of the host no doubt. But there's one overriding question? Where is the sources evidence? and what is the sources credibility? there are alot of uncertainties regarding this information. That is what makes me see this as overhyped speculation, and why hasn't fox asked for the report to be pulled, which is what happened to the spaights leaked alien harvest and shadow 19 scripts. I think scott saw the alien franchise has been exhausted by fox since alien 3, and that an alien film on it's own got fox a bit jittery because of the previous failing of avp r, and they wouldn't commit a big budget or go for the R/18(uk) rating scott requested. it all boils down to money when it comes to tom rothman and fox, they wanted to play it safe with a pg13 3d cheaper psychological alien origin thriller. Scotts a clever bloke and knew if he went in a different direction, using a fresh approach he was likely to get the big budget he wanted and the secured R/18 rating. Let us not forget, even during production fox can still stick it's muddy claws in as it did with alien 3, the abyss, predator 2 and wolverine, butchering a potentially great movie, or even during post production by editing it down to a pg13, then when the dvd or blu ray is released, market it as the unrated version to make money, all i'm saying is see things for what they are but at the same time be weary of fox and don't jump the guns of movie speculation, because we may set ourselves up for disappointment in all facets of this production then.