We have to understand there are millions of shows around the world, so it's very hard to make a show with a completely original concept. Remember Captain Planet? It involves the combination of all elements (plus that useless Heart Ring) to summon the greatest Green Peace Member of all time, Captain Planet. Kinda like AtlA eh? Also some plot of AtlA is borrowed from Star Wars & Harry Potter, not to mention the fighting styles are borrowed from Asian Martial Arts (which has been borrowed by hundreds of anime shows). So AtlA is not entirely original, but what made this one of the greatest animated shows of all time is how the entire series was well executed by Bryke. The show is well balanced; it has great animation and a rich plot (a combination that is currently lacking in animes today, especially the plot). So in closing, Avatar is a great show, and this coming from someone who is a frequent anime viewer and thought this show was a terrible idea. And was I very wrong!