I like Far Sighting into unfinished areas, so I checked out the parts of Tanaan that you don't see in the intro area of WoD. They're really unfinished, obviously. There's a big mountain with an area on top where the sky turns orange and there's a demon-looking altar up there. There's also a dummy orc model still left up there for measurement, so the geometry is obviously not done.
The big gate next to the big cannon you use to blow up the portal hides a path to what I'm assuming is supposed to be a big orc fortress, although it's not done at all and is more like a wall and three untextured towers. There are several open areas around there, but trying to Far Sight into them consistently breaks the channel, so I'm guessing they're actively blocking Far Sight from being used in those areas.
Looks like half a questing zone, which is weird if they're patching it in. I guess a lot of the open areas are where the final raid will be.
There was a random NPC in the jungle behind the big gate, a "Keravnos Wanderer". It was level 98. Not sure that this means. It was not interactible, although it was hostile, and it looked like it was bound by electricity.