cameos yes, but not yet, even though we prolly wont know about kids and stuff till way later, id like to see the end of the series before trying to draw connections/who hooked up with who in the end, etc.<br/>the only thing that we could be fathomable  close to for a while is a son or daughter of Korra's that is a waterbender.<br/><br/>So from what im envisioning in the opening post, rumor is going to spread quickly that The Avatar is near by. This will prompt current cheif of the southern watertribe want to give the Avatar a formal welcome. The Avatar though is given a vision by the southern lights, much like Aangs visions of Toph in the swamp. Something is pulling him away, for the time being, but what? So while everyone else is off and enjoying the welcome, the Avatar has wandered off.