While, I did find this movie very different from the first one. It took a little while, to get all the previous character's, and some new ones going. But once it was going, it was a fun ride. I did enjoy-it a lot, and do not regret getting-it.
Very nice picture, as expected from an animation movie.
Sound was, the side and rear surrounds were spot, so was the overall sound integration from the front stage, and the bass (notice, I do not mention Atmos for ceiling. Read on for the why).
While trying to get my player to load my 4K copy, in my dark room. The movie would not load-up, so after 5 minutes or so. I eject-it, only then I discover that a second disk was under (the BD one [if buying a 4K movie, this practice of double stacking disk, should be done on the BD and extra disk, not the 4K one])
And therefore, forgot to turn my second amp On, that is behind a wall
I bet the full glory Atmos sound would have added a lot, to sound that was very good in surrounds.