If there is any focus on extinct races of mer it'll be some form of the Falmer, not Ayleids.
Im interested only in Ayleids:) I think they had some interest in north, as in Cyrod. At least the lore indicates this. Then, Skyrim must have some ruins, at least at its southern borders.
Why this is important?
Basically, I like them, especially their buildings, even in ruined state:)
But what is most important for me... I want to know, there will be any ayleid-related ressources in a
vanilla Skyrim, as I working on a mod concept, and I thinking to start under Skyrim instead of Oblivion. Since I hate to modeling, with proper resources on the new engine should be a better solution to build the mod.