I think some of the problems with that is Warner Bros. would probably not allow Smallville
to be re-branded as a Superman show -- I think if that were to happen, it would have happened five years ago. WB wants the best of both worlds -- they want their Superman show, but without Superman, and they want their Superman movie franchise, with Superman, because it is more lucrative.
I think so long as WB wishes to continue making Superman movies, Superman on the small screen is going to get short-sighted like it has been for the past ten seasons. Plus, as you mentioned, with the rumblings over a potential new Superman
reboot under the guise of Christopher Nolan, I really doubt we'll be seeing Tom Welling don the Superman suit anytime soon. I think WB will try and drain Smallville
for all its worth, even with rumors of next season being the last, and basically tease us periodically like they have been doing. I don't see how anything will change.
Basically, I've come to the conclusion that the biggest "reveal" we'll see in terms of actually witnessing Tom Welling as Superman is going to be a really tiny reveal at the very end of the very last episode, and that will be it. I think it will leave fans generally disappointed, and overall honestly will leave fans with a bad taste in their mouths, and an overall bad opinion of the show when all is said and done. I just don't see how things can be rectified or turned around at this point. After ten years, Smallville
has fans pretty conditioned to be constantly disappointed.