http://www.newswire.ca/en/story/1191691/ytv-fast-forwards-to-fall-with-eight-side-splitting-new-series
This is an excellent sign for Book 2 coming sooner than we expected. The link above is a report on YTV, a Canadian tv channel, more specifically about their Fall programming schedule. Of interest to us is the mention of new Korra episodes in the Fall.
They mention nothing about the exact date of Korra's return, but Fall is the best we have heard thus far. This more than likely means that Korra will air on Nick USA before Canada.
Fall is a full season so it could still suggest a late in the year, but judging by many of the release dates of other shows mentioned I would lean towards earlier in fall rather than later. As I have been saying for a while, my guess would be late August or September.
Thoughts ?