Ok, it's rumor. But why a prequel? Sounds so weird. Why not a sequel?
I want to say:
AvP films - ex-prequels to Alien.
Prometheus & Covenant - prequels to Alien
And THIS - prequels to Aliens?
Another prequel?
Too much prequels for one universe. Alien Universe lives in prequels? Lives in past? It looks like something philosophical.
No - need a sequel! Not a sequel for a prequel, but sequel for sequels.