Well it looks like the Dragon War DLC is a way to get some of the battles from Fall of the Samurai into Shogun 2 with out buying Fall of the Samurai and as said in a topic on the .com you can get the price of the Dragon War pack discounted from FOTS so I would hardly say its a way of getting people to pay though the nose to get something that should have been in the game.
http://forums.totalwar.com/showthrea...available-soon!