For the next DLC, if Bethesda is following the pattern of a large one with smaller ones in the middle, I belive that they should release a housing DLC. The house add-ons for Oblivion were great. I'm sure everyone had atleast one of those homes as their primary base. They were grand, imaginative, and soo very different from the houses avaliable in the cities. Personally, I loved Battlehorn manor because it gave me the feel of importance and nobility.
I believe that Bethesda should release a pack with several homes of a similar theme. A laboratory for a wizard to practise is craft in, possibly with a staff enchanter (like in Dragonborn) or basic atrinoc forge. A hidden lair for an assasin, or theif. Or a Castle / Manor for a warrior or a noble. I understand that Hearthfire was released to serve as the "ultimate" housing DLC, but it just...fails. There is no distinction, imagination, or signifigance of the homes you build. Imagine owning a Mansion in the Rift, with half a dozen NPC's serving your needs. Of course they could throw in some other features, like horse armor (I'm serious, I miss my armored stallion) or children of other races (Dunmer, Altmer, etc).
I just feel that, from a role-playing perspective, the options for a home are limited. Most of the city homes are small, lack displays for your loot, or are glitchy (breezehome), cramped (Solitude), etc. And the Hearthfire homes get REALLY crowded with a full staff (wife, children, bard, steward, housecarl, pets), not to mention get laggy after awhile. I would even accept a copy of Battlehorn, atleast it looked nice... and Frostcraig could maybe be added in the extreme south of the map?
Beth really did a good job with the home in Dragonborn, so there may yet be hope in the future. You are a god in the game (not litteraly), you should get the best and biggest home there is (I wish you could buy the blue palace

What do you think?