Either Lost City or Forgotten. Anyhow this city would be either in a new location, floating in the air, or underground (dwemers?!). This would be gamesass BIGGEST city since morrowind. It would also have maybe 50-100 npcs. The reason for wanting this DLC is the only thing that's been really missing in every single elder scroll game since morrowind, is a daggerfall size city. Now I know, it would put computers to a halt if it was that big. But I want one that's pretty big. The best part of this city is it will be full of dark brotherhood assassin missions. Tons of really hard rich peoples homes with guards to steal for theives. Imagine THIEF style (the old pc game thief) homes that are huge, but loaded with goods to sneak around an steal. It would have tons of in game missions too, like fighters guild going to peoples homes and killing giant wereboars that don't want to leave.

So if you like this idea, +1!!!!

Also there would be a quest line to find this city, that when you first go there it will be a ghost town. Only monsters daedra ect. You will learn that the people who once lived there (along with their possessions, no stealing stuff early!) are trapped in oblivion. Once you free them the city will become a standard city. Until then in walking in a dead mans city.