Yes, but we've seen a non-bloody (just muddy) version of the trailer, and the latest trailer in which the claret has been re-instated, so I'd hope that's an indicator that the original vision is the one they're going with.
No doubt, even if it is R/18, they'll be a stronger edit down the line just to cash in. It's happened before. 'Too strong for cinema' etc. In the era of DVD and Blu-Ray it's almost a given that an alternate take will appear, probably overseen by Ridley but not necessarily endorsed by him (if he gets the edit he wants now).