It seems like a very key thing to not have added thus far, I know we're still missing other zones but given the comparative size of it you'd think it would be easier.
I'm somewhat hoping Blizz won't add it to the alpha / beta and keep it a total surprise (other than the known events) for everyone.
I'm a spoiler addict, and I don't bemoan that or see it as an issue because that's just part of how I get hyped for WoW. I still think it would be very cool if Blizzard kept the specifics underwraps until 7.0 hits.