sorry if this is old info, I haven't been on this thread much today, but Kotaku is saying that dawnguard will have 2 new large landmasses: Soul cairn we knew about... but what would the other be?
http://kotaku.com/5916595/skyrims-massive-dawnguard-sounds-like-a-proper-old+school-rpg-expansion
Also wonder how word walls will look because if you see the dragon die instead of it buning away it makes a purple aura maybe due to it being in the soul cairne so the word walls might have been affected the same way in the soul cairne.Or the dragon is so powerful it will just teach you the shout and give you the soul once dead.
Also I dont wanna look like a beggar but no one even bothered to pass me a fishystick.
http://www.imperial-library.info/sites/default/files/dogate_til_fishystick.jpg
take one down, pass it around!