Since Wrothgar in 2015 literally every single DLC and chatper have been AD and EP related. As it stands now you are out of AD territory to use after Summerset and Elsewyr. You have half of Black Marsh and maybe a DLC worth of Morowind open, after that Chapter and Murkmire. Yeah, you had the other half of Skyrim, sure....but EP already had Morrowind, Clockwork, Murkmire, a slew of dungeon DLC's and here we are 4 years later with more than half of Hammerfell unexplored and not a single new thing for DC at all. Afer all the time Skyrim has gotten since TES5 released almost 10 years ago, why do that now? A lot of players have had enough of Skyrim. Not the majority per se as I have no numbers to back that up, but the majority of the people I talk to were not looking forward to more Skyrim.
So what gives? When are we going to even see a dungeon DLC based on DC story, much less new zones opening up? Do we really have to wait until Skyrim, the rest of Morrowind, Cyrodiil and Black Marsh to be filled in before you bother getting around to it?