According to Wowtcg, the next TCG deck, Crown of the Heavens, is set for release some time in February 2012.
It was discovered on the 4.3 PTR that the common pet loot card for this next deck will be the Gregarious Grell.
I'm looking forward to seeing how Blizzard approaches this pet, and if they give it any unique model/animations. Hopefully we won't have to wait too long for a preview of this upcoming companion. :P