Are all the lands of Tamriel used in TES/Spinoff titles? because it would be nice if they released world DLC's where you can enter the older worlds of Tamriel whit the Skyrim system & Graphics (Guards world wide were former adventurers who got an arrow in the knee)
Morrowind and Skyrim were the only two games to subtitle themselves after provinces in Tamriel. Then there's Oblivion, Battlespire and Shivering Isles for places outside Nirn.
And wouldn't an expansion taking place in Vvardenfell be rather bland, considering the entire island is an inhospitable dust-choked ruin 160 years after Red Mountain's eruption?