I chose the final RS Prequel, just in an effort to end the plague of loose ends burying this franchise.
In truth, I believe what will save this franchise is multiple directions at once. They almost saved it when we had Blomkamp and the Prometheus sequel, but they hesitated and eff'd up. Disney is likely in a better position to do this than FOX was without them. So there's some hope IMO.
I think they should do this:
1. Greenlight 2 Films - the final RS Prequel or Blomkamp's story and either Alien Isolation or Hadley's Hope story
2. TV Series than begins with the Hadley's Hope story or Alien Isoloation and make sure it continues into new territory and it tells WY side of things in between the films to some extent.
3. AVP Animated series, that does not link to anything theatrical, except maybe the AVP films, and in doing so, excises them from the Alien theatrical canon.
They should also make a point to delete A:R from the canon altogether, even though I do enjoy it.
The timeline is so messed up that I think if you want to fix it and have to choose 1 option, a series is the best case scenario.