I would think RE:Biohazard would be considered more than Until Dawn, IMHO.
It's not rumored. As a matter in-fact, Warner was in development of the film; but it seemed like they didn't give Cawthon enough control, and that he went to Blumhouse instead.
It's happening, and that I would imagine Blumhouse and Cawthon are working closely to make it right.