I refuse to comment on the future of WoT. I mean, why think that anything is going to be the same after Tairmon Gaidon?
The Age of Legends ended with the breaking of the world. There are strong hints that the previous age ended in nuclear holocaust. With the breaking of the world, only the barest outlines of the previous world survived, and those outlines were the peoples, not the physical countries. So although groups loyal to Matt, Perrin, etc. might survive, I am highly skeptical of the actual geography that might be postulated, and that includes the locations of the continents.
I am also skeptical that the one power will survive unchanged. The world is changing. The Ogier are up to something. Sniffers, Seers (I mean Min), Wolfbrothers coming back? It's all part of something that teases at my imagination and suggests things well beyond simple politics. People who base their speculations on what is, rather than what could be, seem to me to lack both imagination and pattern recognition. The Age turning is a massive event. And any speculation on crowns or kingdoms seems, to me, to be something that will either be in a different context or between the "present" and Tairmon Gaidon.