Blizzard is up to something: 'Soon we'll fly together again ...'

Wowhead, BlizzPlanet, and other fansites are showing an image they received from Blizzard with the caption "Soon we'll fly together again ..." The image is reproduced above. What could it mean?

BlizzPlanet makes a point that it could be cross-faction gameplay, given the two mounts are both spectral and one is Horde while the other is Alliance. While cross-faction gameplay is a long-requested feature, it's gotten a lot more attention lately with Real ID raiding.

Another point being made is that the mounts are new and that they could be new downloadable content or the return of the Recruit-A-Friend bonus.

Either way, quite interesting. We'll all have to keep our eyes out.