Yeah, I just noticed that last night after posting in the topic. We haven't had any updated news since.
4 days ago Viacom filed papers to trademark AVATAR: LEGEND OF KORRA
http://www.toonzone.net/forums/showthread.php?p=3611290
All I can say is... YESSSSSSSH! Hope this will be set somewhere in the distant future, or better yet, this season will give us answer on where the hell Zuko's mom is.
I do hope this is treated well and not just a quick buck scheme.