Check this:
Meeting stone says: "Vale Raid Meeting Stone"
Will there be another, a second, raid in patch 5.4 beside Siege of Orgrimmar?
I quess this is the lair of old god Y'Shaarj.
I hope we get two raids next patch. And that we first need the kill Garrosh/Sha of Pride and then we unlock Y'Shaarj's lair or something.