I was going to make a post defending a 16:9 conversion, but then I realized there's no guaranteeing that they would do it right
. I've been watching Seinfeld from a 720p feed recently and I think it's a great example, although there is the occasional scene here and there that looks cramped. If the original film elements allows that kind of restoration I'm all for it. If they were basically going to re-frame the existing 4:3 shots as 16:9, I do not want that.
The TOS precedent seems to suggest that they would go 4:3 anyway. In the TOS case they actually had 16:9 masters they'd made but ended up releasing the 4:3 ones.