I'd love to see the last piece of DLC be a giant war, and you get to assemble your own team of the biggest badasses in the game (both current and future) and fight through battlefields (larger, more encompassing ones, as opposed to the ones we saw in the Civil War), etc etc.
On that idea, who would you put in your dream team? Let's say there'd be a max of Dragonborn+3.
I'd have, of the current characters:
Obviously Dragonborn as the leader.
Neloth (from Dragonborn) as the mage and strategy-master and information holder.
Karliah or Brynjolf (from the Thieve's Guild) as the sneak. They'd steal, observe, etc.
And Serana as the blade/spellsword. Just because I can't think of anyone else who uses swords and is actually.. interesting.