Voltron I haven't seen, but Korra I loved! It definitely does go deeper than ATLA in many regards. I love both of them and even feel as though Korra has a few strenghts over the original. All and all, it's a universe that's hard to top. And as you say, there's no sitting kids down to watch The Sopranoes. So much of ATLA's success is in being so broadly accessible. It's a show for kids and adults. Thanks fo rreading and for the recommendation, Carl!