This film only serves one purpose:

Rating: 1/10 (19 September 2014)

It's kicked Alien3, 4 and the AvP's out of canon, permanently.
* There only ever was one Queen, somehow she made her way in one of the alien ships (lets pretend the Engineers never existed, because they sucked quite badly) to LV-426 - that's the AvP's gone, and Alien3 on the ropes...
* A human torso is far, far too small to gestate a Queen - that's Alien3 a'gone-gone... and with it Alien4
* The alien drones and Queen did not exist until into the far future - that's the AvP's wiped off the board, and of course good riddance
Why should we take this utter piece of crap as canon, over anything else that got made?
For one simple reason:
Everything after Aliens sucked in extreme measure, including Prometheus, but Prometheus is by the original director.
So it's a case of 'we may as well take any help we can get'.
Alien was such a piece of archetypal scripture, that it wasn't ever really possible to make a sequel, let alone sequels, of it. But then James Cameron came along and simply pluralised everything... and it just happened to work! Beautifully!
We went from Art movie to Action movie, and even though the endings were completely identical we didn't care. Something we never thought possible had happened - go James!
Then Alien3 came out and that was the end of that...
One day there might be a good Alien film again, but it's kinda getting a bit late.
Ridley inspired a whole heap of new-gen SF-action film making - as did George Lucas, as did Stanley Kubrick - nowadays I think we are just looking for the next evolutionary step.