People saying "it's just a loading screen" are wrong. The ice has melted, the lich king has awaken from his slumber. Remember what happened when the ice melted around Arthas? That's right, whole expansion. So don't except it to be just another loading screen, if it was they would've put him inside a huge ice-cube. Also, looking into those icecrown spells against Ragnaros, I'm fairly sure something major is going to happen. I always knew Bolvar would come to the rescue with his army some day, I just didn't know it would be this early.