Thing is, that's not the only area added to the game in patch 5.2. The Isle of Giants is a new island, north of Kun-Lai Summit, inhabited mainly by huge dinosaurs. Keep in mind that this island is a no-fly area as well as the Isle of the Thunder.
The Bone-White Primal Raptor
Reins of the Bone-White Primal Raptor is one of the mounts that will require a lot of farming. Here is how everything goes.
Each of those big lizards of the island, drop Giant Dinosaur Bones. In the only cave of this island there is a toll named Ku'Ma, The Bone Collector. This guy is going to buy your bones. I really have no idea what is he using them for, but he needs lots of them. Based on your bones collected this guy will reward you with your Bone-White Primal Raptor...
Here if what you can get for those bones:
|Number of Bones needed||Rewards|
|1 Bone||1.98 gold|
|9 Bones||1xMote of Harmony|
|99 Bones||1xSpirit of Harmony|
|999 Bones||1xSpectral Porcupette|
|9999 Bones||1xReins of the Bone-White Primal Raptor|
You'll also find some friendly faces on that isle and they will try helping you as best as they can, but it's still up to you when it comes to killing those huge reptiles. The trolls inhabiting that island, even if they are only a handful, are just there to stand in your bones farming way way.
Keep in mind that this is still PTR we are talking about and things could change drastically.
The Primal Raptors
While farming for those bones we just told you about, you'll have the chance on looting a Primal Egg. Those eggs will take three days to hatch into a raptor mount if you are lucky. If you remember the eggs from Sholazar Basin, the ones from Oracles, then you'll know what I'm talking about. You'll need a lot of patience with these things.
Anyhow, this time you have the chance of getting three mounts out of these eggs:
Here are a few screenshots taken while exploring that place. It sure looks great, even if its inhabitants are not so friendly.