If they re-scan the film at 16:9 they will have to watch every second of every reel of un-edited film for the entire show to make sure there is no equipment etc in the shot! Maybe this is why it is taking so long?
- Though on the other hand they might be 100% sure that this never happened in which case I bet they go 16:9!
I think we will have to wait till next year for an annoucement because TNG is 25 next year. TOS-R announcement came out of the blue for the 40th anniversary iirc.