Apparently, it will be 40 US dollars for 15 hours, nearly the price (or the price in some countries) for a brand new game. On the other hand, Uncharted 2, is only about 8-12 games, I think? And they're still asking full retail price e.g. 50 US dollars for it.
As I'm watching the trailer, I must say that I'm astounded. The plot for this expansion just seems like a rehash from the main game's OC plot e.g. build an army. Now you just (re)build the Grey Wardens. And DA: Origins - now with talking darkspawn - it seems.