Let's talk about what Allied Races Blizzard can add in the future.
Here is my current wishlist:
Human - Half Elves
Dwarf - Wildhammer, Earthen, Frostborn
Gnome - Lepers, Mechagnomes
Night Elf - Children of the Forest
Draenei - Broken
Worgen - Timber Worgen from Canada Grizzly Hills
Orc - Mok'nathal, Mag'har, Blackrock, Dragonmaw
Tauren - Taunka, Yaungol
Troll - Forest Troll, Sand Trolls, Frost Trolls
Undead - Skeletons
Blood Elf - Darkfallen
Goblin - Hobgoblins, Gilgoblins, Vulpera
Pandaren - Tuskarr, Tortollan