2 videos for you.

Zaheer

First up is the trailer that is currently airing on Nick to hype up the Book 3 Premiere next Friday https://www.youtube.com/watch?v=z1eWFelQzd0 I really like this as a tv trailer, very much gets over how powerful the villains are and that more airbenders is the big selling point this book. Second is a quick video where Mike and Bryan talk a bit about Book 3. Primarily it is a set up for how much things have changed going from Book 2 to 3, nothing hugely important, but worth a watch. http://www.nick.com/videos/clip/digital-short-legend-of-korra-bts-creators-talk-book-3.html