Hot from the latest patch 3.3.3
PTR updates are some stunning images contained in the data files. We don't know where you can get the above pictured Celestial Horse -- a lot of people are speculating about its location, but no one knows yet.
First up is the Celestial Horse you see above:
In addition, they've been tinkering with existing "tigon" models, the catwoman/catman models used for various Troll-related bosses. Most notably the bosses in Zul'Gurub. These will likely crop up in the reclamation of the Echo Isles.
Next up is a Twilight Dragon model which we'll see in action in the Ruby Sanctum.
This post will be updated throughout the evening as new models come in.