If we're going to do retcons, why don't we get really crazy. Ignore Aliens and Alien 3 and do a sequel linking Alien to Resurrection, or even:
AVP > Alien 3
Aliens > Resurrection
AVPR > Prometheus > Aliens
Prometheus > Alien 3 > Resurrection
Predators > Alien > Resurrection
Prometheus 2 > Predator 2 > AVPR > Alien 3 > Resurrection
Predator > Prometheus > > Alien > Alien Resurrection
The possibilities for filling in the gaps are limitless.