Board Thread:General Discussion/@comment-96.39.244.184-20140521134944/@comment-5824038-20140907153239

Well, Bethesda like to add little hints in their games as to where the next game will be set. When escaping Helgen, after fighting the giant spiders whoever you're with (can't remember if it works for either) says 'what next, giant snakes?' There are only two places where giant snakes are found: Akavir, and Elsewyr.

Alternatively, Maiq at one point talks about were-bears, which only appear in three places: Skyrim (already visited), Solstheim (visited very recently), and High Rock (not visited for quite a while).

I'm not saying this is definite, it's only a theory. :)