Here is a scene from Legend of Korra's Season 3 released by Bryan Konietzko on his Tumblr blog. The picture features Bolin, Pabu, Naga, and Oogi.
Additionally, the official Legend of Korra Facebook page even posted the picture from Konietzko's blog post with a hint:
"Oh hey there Oogi, can't wait to see more of you in Book 3!"The caption specifically draws attention to Oogi, the flying bison. Perhaps it is meant to hint that we will be seeing much more of Oogi, or that maybe he will have a larger role in the plot of Book 3.
- First 4 Episodes of Book 3 Have Been Complete
- Screenshot of Lin Beifong from Book 3
- Season 3 Animatic of Asami Sato from Storyboard