Also, it is the only way (or one of the few for now) to establish a solid link with the Alien timeline. Although it's not like they are having that particular plan right now
but instead with the AVP concept. But honestly if I were them, I would go for the AVP reboot from the scratch, because:
1. One AVP film is mediocre and the other just horribly bad.
2. The Alien prequels are there, and such movies are canon no matter what.