It's primarily an announcement of reprinted stories, but here's the main part:
So, Joss Whedon started the tune and everyone from Charmed to Avatar is joining in on the relaunch comics phase. That's not a bad thing. There are still plenty of threads for them to tackle:Additionally, Dark Horse will create all-new Airbender stories that will be published as digest-style original graphic novels—conveniently sized paperback collections—in early 2012. Picking up where the season three finale left off, this new series will follow the further adventures of Aang and his friends, as they help to rebuild a world torn apart by 100 years of war.
* The Hunt for Ursa
* Toph's strained relationship with her parents
* The rebuilding of the Air Nomads
I'm also curious how much set-up for The Legend of Korra will be in this.