Someone needs to explain to Disney that Alan Dean Foster is Alien Royalty. He's been a part of the franchise since 1979 with 4 novel adaptations (+the Covenant prequel).
Honestly if the adaptation doesn't happen now it will never happen, just like Prometheus. It'll be a loss for all fans, and another gap in the book collection. They friggen' made a Vasquez back-story book to monetize the brand for Pete's sake, so I don't see why they wouldn't try to do a Romulus novel. What the heck is going on over at Titan?
Also, they really should make a Prometheus novel. They could literally work backwards and provide some character back-stories just like Orson Scott Card did on the Abyss novelization. It would be a really worthwhile addition to the library.