Obviously, there’s no word about how you’ll get this pet, nor are there even screenshots of what it will look like. It could be a cross-promotion between the games (which seems likely as the model is encrypted), or it could be a major reward from the next expansion. But it’s in the game’s files, meaning that at least some work has been done on it. Good news for everyone whose pet collection doesn’t include enough turtles at this point.
Source: Wowhead via Blizzard Watch