The amount of story changes that happened to Zootopia still amazes me that it could've easily gone the wrong way. Imagine all these differing concepts for the movie and somehow, they were able to create a coherent plot. Looking at other movies where creative differences can lead to a mishmash of tone in the movie (looking at Justice League), Zootopia could've easily ended in failure. The movie's release was delayed due to story changes, you'd think the movie had problems. Thankfully, Byron Howard and Rich Moore were on the same page and shared the same vision and wanted the thing, so we got the movie that we wanted. It's a rollercoaster