No. This in no way will make alien 3 "better". Nothing will ever make a movie about a bunch of pathetic prisoners better. Maybe it will clear up a few things about the beggining, and that's all fine and dandy, but it still won't make it better.
If someone said to me, "hey, we are going to release a monster into a prison loaded with a bunch of murders and rapists and your supposed to care about the people", I would have replied with, "go ahead, I'll enjoy watching garbage die, but I don't care one bit about them".
Somehow, it's still better then resurrection.
But to get back on topic, I am still looking forward to the game, but I have a bad feeling it will be mediocre like the last avp game. As for explaining the egg from alien 3, it will be interesting to see how that is handled.