Curious, which will you prefer? Gilbin are coming in 8.2, though we have seen them from 4.0 in goblin areas and Vashjir.. lot of excitement about Vulpera who use the same skelteon so is a possibility.
Mechagon is strongly hinting the alliance allied race will be Mechagnomes or junker gnomes - whatever their name is, so the horde will likely get a little race - the choice is either Vulpera or Gilbins.. which would you prefer?