Sadly, two years
April 2013
The Legend of Korra: Book 2 - Spirits will begin airing on Nickelodeon in the United States in September 2013.
The season finale of the Legend of Korra, Book Two: Spirits, premiered on November 22, 2013.
September Icant wait
Season 2 of The Legend of Korra was called Book 2: Spirits and the release date was September 13, 2013.
Well as I know and find out is The new seriese the legend of Korra will Have Two (2) books only and the book 1(Air) Have 12 chapters and and book 2 ( don't know what will be about) will have 16 chapters and I don't know if they will change Their Mind or Not cuz the director is pretty creepy first he make his mind to make book 4 but after that he changed agin...,,,, we miss Ang :(
The Legend of Korra - Book 2: Spirits will be about Avatar Korra's connecting to her spiritual side. It will feature a journey around the world, the South Pole being attacked by Dark Spirits, a civil war between the water tribes, and the origin of the avatar.
Yes, Mako and Korra will be together in Season 2.
Nickelodeon have said that they may be releasing Book 2: Spirits of the Legend of Korra in February 2013. That may just be the trailers for Book 2 they haven't officially announced full details. Hopefully it will be out soon as we are crrently in March. :)
The Legend of Korra Book 1: Air premiered on April 14, 2012. Book 2: Spirits premiered on September 13, 2013. Book 3: Change premiered on June 27, 2014. Book 4: Balance premiered on October 3, 2014.
The Legend of Korra - 2012 Skeletons in the Closet - 1.11 was released on: USA: 23 June 2012
The Legend of Korra - 2012 The Southern Lights 2-2 was released on: USA: 13 September 2013