"Here's a bit to chew on from the trailer: Shot of a statue of an older Aang, A shot of a flying bison (Appa still alive?) flying over .a frozen tundra, a battle arena type thing (closer to Pokémon than earthbending rumble style) AND AWESOME FIGHT SEQUENCES"
-Big City: United Republic. Founded by Aang and Zuko.
-Korra's team. Two brothers, Mako and Bolin, they are fire and earth benders
-"Mako is the brooding...not as amuch as Zuko, Bolin is the younger, goofier brother. Kind of naive."
-Korra rides a female polar bear-dog named Naga
-Bolin has a fire ferrett named Paboo
-Aang finds a herd of Sky bison after the war; different from Appa
-Flying lemurs will be in season 2
-Aang and Katara had three kids, youngest is Tenzin. Tenzin has three kids as well. Voiced by JK Simmons. Tenzin's wife not an airbender
-Anti benders: The Equalists. Use chi blocking.
-Lots of steampunk stuff apparently, United Republic is like "20's Manhattan"
-Toph travelled the world and taught metal-bending. Still rare
-Metal bending swat team led by Toph's daughter
-Season 1: 12 episodes. Season 2: 14
-No airdate set yet.
Tenzin and his youngest son
I am getting really excited about this.