http://www.geek.com/articles/games/skyrim-dlc-dawnguard-is-xbox-360-timed-exclusive-2012051/
After the D-Day release of Skylag Beth plans exclusive release of it's DLC. This is what will cause format boycotting of the game. Come on Dragons Dogma !!!!

You would have to be an idiot to go boycotting anything.

Its been common knowledge since before the game was announced.

There is a topic for discussing Dawnguard, use it please.