The PTR patch notes for 3.2.2 have been released, and as we've mentioned, the big news is that Onyxia is being scaled for level 80 players to help celebrate the fifth anniversary of World of Warcraft.
One of the drops will be a rare 310%-speed mount modeled after Onyxia, and Boubouille of MMO-Champion already has some images of the mount, which can be viewed by clicking the picture to the right. Boubouille also has a list of some items that have dropped off Anyxia on PTRs, as well as information on other new mounts and pets coming in this anniversary patch.
You can discuss 3.2.2 in this thread started by NeithanTheWronged in our WoW general forum. You can read the full patch notes below.