Interesting to find this old thread here before Prometheus came out and messed up the Alien timeline concerning the AvP events. I think they should perhaps reboot the whole franchise as it has been a string of disappointing movies for several decades.
The state of play as I see it: The AvP movies are not considered cannon in the Ridley Scott universe, I think they gave up after AVP requiem bombed in every way possible.
I think Covenant performed badly enough that they won't continue with that convulsed storyline either.
Same with The Predator. The critical and audience reception was pretty bad considering the legacy of the property.
I doubt we'll see anything on the big screen with a predator or xenomorph for a few years, while Hollywood figure out how to write coherent three act scripts