As according to the front page, Deathwing will be randomly obliterating regions of Azeroth periodically until he is defeated. While this sounds like Devilsaur/Fel Reaver/Whale Shark 2.0, it also gives you the achievement "Stood in the Fire" upon being killed by him. How do you like this idea of "Be killed by not recognizing your surroundings, but oh hey, you get an achievement."