We just heard from NBC and American Ninja Warrior about the next season. Think you have what it takes to be a ninja warrior? Here are the juicy details: American Ninja Warrior is back for Season 6 and there are some exciting changes: The first being that all episodes will air on NBC only. In addition, we’ve made the application slightly shorter and we’ve cut the previously required video length in half. As always, we are looking for energetic, creative,…