Definitely the undead origin. After seeing just how in-depth and interactive the origin stories can be compared to the last game, I'm really excited for any more they'd put out.

Will they start out alive, or dead? Who will back them on their quest for divinity? Will they be able to talk to other undead? How will people react when they tell him they're undead?! Will they have to wear a mask/full clothing to hide their true nature (like others in the game)?!

I mean, will the character just walk up to the undead shopkeeper across the bridge, or Gratiana at the haven, and just be like "Sup?"