When Prometheus is released theatrically in the uk, it may very well receive a 15 rating, if it's very intense and scary. Cloverfield, a v p (with and without the added cg blood), a v p r, die hard 4.0 ( both versions) and predators all received a 15 certificate. The Dark Knight, terminator 3 (with no cuts) and terminator salvation got a 12a for both different cuts of the film , just u.s. uncut version was known as the directors cut in the u.k. It's surprising how rating systems work from country to country