Recently, Janet Varney, voice of Korra, stated that Korra Book 2 was confirmed to be released in April. Well, to all of our dissapointment, she has corrected herself:
Misinformation alert! Korra premiere has NOT been annc'd. Lots of rumors/miscommunication-let's wait forofficial news from @<a href="https://twitter.com/nickelodeontv">nickelodeontv</a>— janet varney (@janetvarney) <a href="https://twitter.com/janetvarney/status/317484683829059584">March 29, 2013</a>
So, to sum up, Korra Book 2 once again has no confirmed release month or date. Though, then again, they never said it WASN'T April!
https://twitter.com/Aprilstewart/status/319231163816361984">April 2, 2013</a>