I don't want to see Alien 3 retconned or ignored (AR, on the other hand, was practically begging to be ignored by setting itself 200 years after the others). But the bigger question on my mind is:
WHY?
Why do we need another Alien movie? AR was a classic example of what happens when Fox just wants more o' that Alien money: a buncha guys on a spaceship running around getting eaten. Who cares?
All we know so far is what Blomkamp intends to not do. Until we know what he plans to do, I just can't get interested in this movie. Prometheus 2 for me, please.