They said in between pointlookout and shivering isles, which it is.

I thought Dawnguard was not bad I enjoyed it and I liked how they gave vampires more spark but I feel that Skyrim doesnt need a whole new big expansion I think there is more than can do with the Main storyline and the Civil war storyline as for all you Daedric worshipers skyrim does not need another Daedric realm Skyrim is a place of ancient tradition and heritage its unlikely that Bethesda would add another realm simply because there is not that much Daedra influence there to begin with but I see some possibilitys with Hircine but over all the Soul Carin was awsome but could have had a little more work and added elements to make the player want to visit there more same thing goes for The Vale.