We should also think about where they could take the game to next. As I recall though, Morrowind and Cyrodil were the 2 largest continents (Or maybe Daggerfall was bigger than both of those...), so any game that continues away from those two lands will have to let you go to multiple lands. Or it could give us back a chunk of Cyrodil and Morrowind to explore along with the other lands. Or they could make the whole game set in Oblivion or somthing like that with the mission of getting back to Cyrodil.
__________________
|