On twitter Nick says Book 2 is “Not quite” completely finished.
We know The Track Team is starting on the music & sound design and Bryan has posted pictures of color correction sessions - those are some of the FINAL stages of animation. It’s close to being done guys, be patient, quality animation takes time! :)
note: I don't care if you use any of these screencaps. No credit is needed, just don't repost and claim them as your own because I do edit some of them.