Supposedly they were still supposed to be happening this expansion but they've already stated they haven't even started on them in a blue post just a few days ago.
So, I imagine that will come in the final patch of the expansion at the earliest. Which is pretty terrible, but if we wind up getting an Azshara expansion following Warlords, I'm ready for the alleged "year" of Warlords to pass so we can just move on.
Still would like to see updated model for blood elves, but they're going to look pretty much the same anyway so it's not like it's a huge deal.