From what i know, it's not possible to use ScummVM for console ports due to it's open source agreement. Console giants will never accept this because it will violate their closed SDK distribution license. From the information available on the net, it seems that the restriction on the console porting distribution was the reason that all negos between ScummVM and Nightdive stopped. Nevertheless, would love to know more about this proprietary license you mention; if such is possible this could open alot of possibilities.
https://www.eurogamer.net/replicating-blade-runner-why-the-adventure-game-classi...
https://www.pcgamer.com/blade-runner-enhanced-delayed/
https://www.rockpapershotgun.com/nightdives-blade-runner-remaster-is-delayed