I personally think that they are going to do some sort of minor return to morrowind. Why do i think this? Because i keep seeing the book about the ruins of Kemel-Ze. This was a book that returned from morrowind, and morrowind had a million books, why did they choose this one to return? I think there may be a small trip to mainland morrowind to the legendary ruins of Kemel-Ze.
Another DLC theory for me is Orisinium and or Wrothgarian mountains. Why? Because so far the orcs havent really had their own thing, and i have been seeing a lot of orisinium references returning. I think that there may be a DLC that that has you go into the wrothgarian mountains west of skyrim where orsinium is located. I can see a small new landmass that is reachable by going west from falkreath.
Also theres the possibility of a vigilant of stendarr questline and perhaps a morag tong questline. (theres a guy in the thieves guild that says he was in the morag tong and all of the morag tong dispersed and went their seperate ways but one day they would reuinite to form again)
Anyway, those are my ideas, what do you guys think?

