There is a new sneak peek of the first 5 minutes of Legend of Korra Book 3's first episode on Nick.com. In it we get to see Asami come to comfort her girlfriend and make bedroom eyes at her. Also Bumi starts airbending or something.
I am surprised they moved that fast into the "people get the power to airbend" now. But it is better then dragging everything out in my opinion!
The Legend of Korra: A Breath of Fresh Air: "Extended Sneak Peek"