Maybe the Morag Tong and Dark Brotherhood alongside one another, and you could choose sides and help your chozen guild try to bring down the other one... Ooh, that would be awesome! :blush:

As for elves, I want Dunmer refugees and maybe some Falmer? Though I guess technically they're almost extinct.

And I wonder if they have Daedric and Dwarven ruins in Skyrim... which would be awesome, I loooved them in Morrowind.

Dwemer ruins in Morrowind, Aylied ruins in Oblivion, Falmer ruins in Skyrim. All the ancient reminders of an (nearly/probably) extinct Elven race.
I hope so anyway.

On the subject though, I think the Dunmer and Nords will become BFFs. Just a feeling.