Legion Class Mounts

Warrior: proto-drake covered in weapons
Hunter: a wolf-eagle crossbreed
Rogue: a giant raven
Paladin: a holy horse
Warlock: a fel horse
Mage: a floating disc
Priest: an owl
Druid: also an owl
Death Knight: an undead dragon
Monk: a tiger
Demon Hunter: a demonic gargoyle
Shaman: a dopey elemental made out of sperm and farts