We have no idea where they will be available or when, but if I had to take an educated guess, I would think they are patch 4.3 Darkmoon Island rewards of some kind. Take a look at the screenshots in our gallery.
Gallery: Patch 4.3: New spectral mounts
Brace yourselves for what could be some of most exciting updates to the game recently with patch 4.3. Look at what's ahead: new item storage options, cross-realm raiding, cosmetic armor skinning and your chance to battle the mighty Deathwing -- from astride his back!
Filed under: Cataclysm