Leaked Legend of Korra Book 3 Image features Asami Sato in this storyboard panel for LOK Season 3.

Here is a storyboard screen from a Book 3 animatic of Asami Sato. This one was released quite some time ago, around May 2013, way before the Book 2 premiere.

Nevertheless, it's still quite an interesting shot. Speculations and comments are always welcome below.