The next game is OL, and with the associated upkeep of a MMOFRP, it may retard development further. But I said "Lore Related" DLCs, there's still plenty of dicking around the can do like Hearthfire. I'm of the opinion that this one has pretty much run it's course as far as story, unless they're going to actually take my advice on tying up some of the lose ends instead of adding on more wanking with retconned ancient enemies nobody'd ever heard of before like The First Dragonborn (Seriously, am I the only one that thought that a little more than glaring?)
I'd like to see them do Something, anything with the foresworn. They dominate the NPC list, there's more of them than Bandits, and they're limited to 1 hold. And,... nothing. You can fight them, or do 1 quest which changes nothing, but kicks down some decent gear to make up for it? Where's the Story, man? I feel much the same about the Thalmor, why you leaving us hanging, bro? They're so central to the main plot, they're basically THE enemy, you fight them so much more than Alduin, and yet, there's no advancement in the story whatsoever. Whoever you side with in the Civil War, you should be able to rally them against the Thalmor, and drive them out of Skyrim, Again. Perhaps a chance to see what their real plan is, instead of just a few dossiers a quarter of the way through the content, and then nothing to expand on that.
If I were writing this, I'd deal with all of that, long before blotting out the sun, twice, and making stuff up that was never supported in the lore when it should have been. I mean, how much of a coverup would Hermaus Mora had to have done to wipe all referance to the First Dragonborn going from drinking buddies with Ysgrammor to Dragonpriest to the second most powerful mortal in Oblivion from the history books? Oh look, I get to respec a skill! What were we talking about?