It looks like progress for Avatar The Legend of Korra is well underway, in an interview with Andrea Romano (The Voice and Casting director for Korra, and the original avatar the last airbender series) when asked by ToonZone.net if she had started work on Avatar The Legend of Korra Andrea said "I already am. I've recorded three episodes. It's seventy five years in the future." See the full interview below: [caption id="attachment_1823" align="aligncenter" width="300" caption="Andrea Romano Released some New Information About Avatar The Legend of Korra to Toonzone.net in a roundtable discussion"]Andrea Romano Avatar The Legend of Korra[/caption]
TZN: Will you be working on the new Avatar the Last Airbender series? ANDREA ROMANO: I already am. I've recorded three episodes. It's seventy five years in the future. TZN: Will Aang in any way be in the series? ANDREA ROMANO: I don't know how much of the series I'm allowed to tell you, but that whole generation has died. It's the next generation. So it's really cool. It's the same producers. It's the same brilliant attention to detail and I'm very excited. Right now we are just making twelve of them and we'll see what happens.
Sources: Toonzone.net Interviews Andrea Romano - Look at very, very bottom of article