Is anyone NOT looking at Alien 5 as a spinoff? Blomkamp seems to be interested only in making his own sequel and not actually contributing to the already established alien saga. We will always have aliens that take on host traits, even if he changes this, they will just be alternate types to me.
BTW I am expecting more of a colonial marines movie with aliens, rather then an alien/aliens movie with colonial marines if you know what I mean. Still excited but keeping realistic expectations.