New race: Pandaren, playable by horde and alliance. (racial 3sec sleep)
New class: Monk (Available for all races. Tank, healer and DPS(prolly just melee))
Yet another new talent system and new talents.
Pet battle system (I have no clue how this works? pokemon?)
Challenge mode dungeons. I suppose these are similiar to hardmode raidbosses.
Level cap raised by +5 (90max)
New continent that has cartoonish asian theme.(new continent is a flyzone at max lvl)