I don't see any reason to remaster TNG...
I'd rather see the money go into re-vizing/remastering the effects in Star Trek V -- under Shatner's supervision.
Insurrection's sfx have a better shot of being redone, Star Trek V, shatner wanted to do a lot and with the reboot, I doubt it would happen with either, but it might be interesting to see to see how it would look if shatner got to the money to do what he wanted. The question would be if he doesn't go over budget again.
It would require a much bigger budget than TMP did...simply because -- IMHO -- EVERY shot would have to be replaced and the rockman sequence would have to be created...