yes after they are done with all the series of the legend of korra
The entire Legend of Korra series is available on Amazon Prime.
yes there will be a second Legend of Korra series coming out in 2013
The Legend of Korra was only planned as a mini series, but due to its high popularity, it is being turned into a full series. The producers are working on a season 2 now.
It has not been announced whether the Avatar series will continue after The Legend of Korra. If a sequel does get planned, it probably would not get announced until The Legend of Korra ends which will be sometime in 2015 after season 4 ends.
September Icant wait
The spinoff series to Avatar: the Last Airbender is The Legend of Korra.
Yes, The Last Airbender: Legend of Korra
there is going to be Avatar The Legend of Korra
Zuko hasn't been seen in the Legend of Korra YET, we don't know whether or not he's in this series or not at the moment - we'll have to wait and see if he's in the series first.
The Legend of Korra? It began on April 14, 2012