I have thought about this for a while and have come to the conclusion of Neutral Races.
Goblins, Tuskarr, Ogres, Naga, and Murlocs.
Those Races could all start in different areas just like any other Race but they should start off on their own Continent......except Tuskarr.
They all have individual capitals like Tuskarrtropolis and Undermine.
They do a quest at level 30 to Attune to a Faction....Alliance or Horde.....These quests work like Aldor and Scryer to allow PvPing and other stuff like that.....
They all can ride mounts for a certain race without being Exalted like Goblins can ride Horses and Undead Horses without going to Exalted with Humans and Forsaken. And they get their own race's mount like the Goblin Rocket MKIII.
The horde and Alliance can be Exalted with the Neutral races as well....
Just an idea......Suggestions?