Well the game itself as far as the story goes is subject to change come 1.2 - 2.0, so there is a ton of time for SE to introduce new races as far as story goes. The Viera for example as portrayed in FFXII are not a race that involve themselves with the modern world.

With that being said, they could in fact add new race within the coming patches leading up to 2.0 since I'm "assuming" they will allow players to recreate their characters when the game becomes "complete". As far as I'm concerned this entire game is still under beta, and I hope that they can use that to their advantage to create a better more fuller character creation. I personally like options, the more time I spend trying to decide what my character will look like visually, the less time I'll spend desiring other aspects of the game.