Calm down dears, what it is, is great viral marketing for the movie. It won't be in the film but it suggests the universe the story operates in.
Bloody clever stuff, either way it has no bearing on the quality of the final film, which all signs suggest will be rather spesh...
Nobody is mentioning the 3D btw, this Ridley Scott film will be in 3D. Horrifying 3D hopefully, in the right way.