The Legend of Korra

Or Bolin.
I can forsee Korra learning Airbending, Mako learning Lightningbending and Bolin learning Metalbending.

I mean it's not like they have pro-bending to do anymore, and there is a 'war' raging

You don't learn lighting bending you just redirect it. I see bolin learning tophs type of metal bending, spiting on the hands and bending the actual metal not having wires. -_- Biggest let down ever!