The Dwemer are DEAD. And, once again...They are "Dwemer." Not Dwarves, "Dwemer."
Well, technically, the dwarves of D&D aren't really dwarves either, they're separate species from humans. A dwarf IS a human.
On Topic: Don't mistake the Altmer for the Aldmeri Dominion. Altmer is a race, each individual having their own agenda. Also, not all Thalmor followers are elves. Just saying.
I'd love to see this for TES 6, but not as an expansion. Expansions are always tiny compared to a full game, and the Aldmeri Dominion deserves a full game to be presented properly. But maybe we'll get to play an Aldmeri plot during an expansion, maybe an Aldmeri cell trying to invade Skyrim or something. That would be cool.
I think we'll see more of Hammerfell, though. It's a great contrast to the Icy north of Skyrim. Or maybe the Orcs of Orsinium. I doubt we'll see much more of Morrowind though, or Cyrodiil.