Human - Half-Elf
Dwarf - Earthen
Gnome - Leper Gnome
Night Elf - Nightborne
Draenei - Broken
Gilnean Worgen - Emerald Dream Worgen
Orc - Half-Ogre
Darkspear Troll - Revantusk Troll
Tauren - Taunka
Forsaken - Skeleton (possible sexual dimorphism issue)
Blood Elf - Undead Elf
Goblin - Hobgoblin
Pandaren - Furbolg
I'm using the term alt-race because many of these wouldn't be subrace or subspecies of playable races. I excluded things that could simply be skins (mag'har, Wildhammer, etc) because those can be added as skins again without a seperate starting zone.
What do you think?