Perhaps the next installment could be a combination of valenwood and elsweyr, or hammerfell and high rock.

Also, it may be time to include some in depth relations with Tamriel's neighboring continent, Akavir. Maybe the Tsaesci will have an invasion.

What if the setting was even further in the future than skyrim, and the demographics of Nirn were to be altered in total? It could be that the Tsaesci will invade and take over part of any relevant region in Tamriel.

Please use the http://www.gamesas.com/index.php?/topic/1242906-official-beyond-skyrim-tes-vi-3/ or http://www.gamesas.com/index.php?/topic/1279536-next-tes-location-vote/ for discussing future games.