Saying AvP is dead is foolish. If the EU becomes popular enough and the idea becomes potentially profitable and/or a director who likes the concept takes it on as a pet project then it will get made, and the chances of that are higher than most franchises. Will it be good, who knows?
Will there be a reference to the Alien franchise in the Predator? I highly doubt it. Fox seems to like the idea, it's their longest running crossover series I think, though I may be wrong. It depends really on how tightly the reins are in Shane Black's hands. There very well may be some background detail that has no effect on the plot whatsoever, but again I doubt it.
That said, everything I've read about the movie so far sounds like a bad joke so anything goes I guess.