I'm sorry, I just don't see it happening.
When has Disney ever played it anything but safe?
I can't see them buying Alien series, then doing something super experimental with the franchise right out of the gate without the title creature.
I think it is 100 percent more likely that they will set a formula off what made the first two films successful and run with it.
To me it reads like he is relying on his name to try and get Disney to spot him some money so he can run with ANOTHER attempted reboot of the franchise.
I love the first film, and there were elements of Covenant that I like, but c'mon man, this dude has basically buried the franchise over the last decade.
For him to direct another sequel/prequel that directly ties into the mythology he'd have to sell out on his vision big time.
That or maybe they throw him a bone and let him develop a series set in the same universe that doesn't directly impact the films. His comments of late remind me of what his comments were in the void between Resurrection and Prometheus.
He's had his shot already, cut him loose.