I'd also like to see Korra visit the Spirit World. Maybe the Spirit attacked her because she isn't completely fulfilling the spiritual duties of being an Avatar. I remember that clip where Korra abused the Avatar state to win a competition too - very interesting how easily she can enter it, when the state is more of a final countermeasure.
In that pic, I think she's cornered. She's obviously angered, but what exactly would nearly back her into a fence, don't know...
I was wandering around Nickelodeon's site and apparently they added a new LOK mini game. Korra keeps running, avoiding Equalizers, but she can use her airbending to double jump. :O And yay, cabbages! http://www.nick.com/games/legend-of-korra-republic-city-run.html