WoW Petopia Community

Appears that you can get into Twilight Highlands on the current build.

I didn't see many beasts - and the ones I found were all untameable.
There are some: -
Northrend style worgs (black).
Stags & doe's.
Elementium Spinners (rock spiders)
Untamed Gryphons (and assume they will remain untamed by players!).

Didn't find much else.

I think they're going to do more to TH. For example, Badlands, while able to get to, was barren for the longest time. Then, the other day, it was swarming with mobs and quests.

Yeah I've been assuming as much. It's a bit too barren at the moment (in places)!