oh and Colin Strause confirmed on alienexperience that you wont have to wait 50 minutes to see the creature. This is only because you cant get away with the alien79 approach anymore as the characters arent that mysterious.
Before you see that as a bad thing, the director said that "less is more", we wont have anyone wearing red t-shirts this time

and that what will happen is that events will get gradually bigger getting the audience more and more involved with the story.
like ive said throughout this thread...this movie will be real good. Also - the Pred Alien will make an appearance, along with MORE new species...and theres a strong chance of the queen returning.