Akavir. Akavir. Akavir.
My first reaction to the announcement of a TES4? "Wait, Oblivion? I wanted Akavir!"
My first reaction to the announcement of an add-on to TESIV? "Wait, The Shivering Isles? I wanted Akavir!"
My first reaction to the announcement of a TES4? "Wait, Skyrim? I wanted Akavir! But holy f***ing shit, that trailer looks badass."
Actually, I am still hoping that the add-on to Skyrim will be set in Akavir. I mean lore-wise, it's the continent of dragons. Seeing as how they finally have an engine capable of doing those, it would be a definite possibility.
As for the others... Yokuda? Wasn't that one destroyed?
The Summerset Isles/Valenwood? Ugh, I hate the Altmer and Bosmer so much, I think I'd rather play a game set on Thras, home of the Sload, a race of evil slug-man necromancers(and, according to Morrowind, apparently also master soapmakers).