By "potential reset", I mean a literal RESET.
What I'm thinking is that Yen Sid or whoever sends Sora and Riku and Kairi and whoever else back in time to the DI the day before the storm, somehow leaving all of their memories intact. TIME TRAVEL MAN. They destroy the Xehanort existing there, and continue to live on from there. Thus a reset for the next saga, Xehanort can't cause harm to them, and we get 14 year old Sora again, pleasing Nomura immensely. *laughs*
I don't like this theory, personally. It's not even a theory really? Someone should build off of it, I guess. Or not?
Also, a reset like that probably wouldn't even be possible, would it?