How well do you think they're going to be able to re-create the Enterprise-Nil bridge from TOS in "Relics"? In that episode only a portion of it was built as a physical set the rest we see was edited in from, I believe, the original series' film stills. I wonder how much better this process will look when done today.
From memory (ie: Don't quote me) they built a wedge of set which you can see Scotty walking on and sitting down in. The first shot when the doors open is a still from a TOS episode which featured the bridge empty, and the shot of the viewscreen is footage from a TOS episode. (Pre-remastering, naturally. You can even see a hair on the footage.) So hopefully, they'll use the remastered TOS footage for the still and the viewscreen. Surely they will.
I wouldn't be surprised if they go with a cg matte for the the empty bridge shot and view screen. Not sure how much sharing of footage from other Trek projects there will be with TNG-R, we will see!