Shamans: Will get some kind of CC for mobs, Maybe also new kind of Totem.
Hunters: Will get Mortal Strike that gives 40% Healign Reduction.
Druids: Blizzard throught about making a new upgraded Bear form, Decurse and abolish poison in Tree form.
Warriors: New Stance (Maybe).
Priests: Whole new Healing Spell which should be quite Awesome.
Warlock: New Demon, and Might get a Buff for Like Spell Dmg.
Mage: New Polymorph, Crazy Dps.
Rogues: Dunno :p
Paladin: Dunno :p
But all will get Whole new Talent tree, and ofc new spells and skills
Proffesions:
Inscription, Etc Gives -0.5 Cast time on greater heal or like 2% Crit chance on Fireball.
Ill keep this post Updated.