In movies designed for children, there is very rarely any explicit blood and gore. Nor should there be, honestly. But in The Lion King, the villain is eaten by hyenas while alive and the Good King is trampled by wildebeast. Most fall to their deaths, but very rarely do they reconcile with anyone. I mean heck in Hunchback, we have a song where Frollo talks about guilt and lust. Disney can be more complex than you'd think, if quite a bit Anglocentric. However:
-Comedy relief roles will be increased, like Marco
-The motives of the Yeerks will only ever be implied by their sarcasm and bitterness
-All good characters will receive reasonably happy endings
-They will still play with the nature and cruelty of war, but the effect wouldn't be as strong. However, the Andalites will still be displayed as being arrogant and slighty in the wrong. The Animorphs will explicitly, ham-fistedly discuss that to make it more accessible for younger children
-The Hork-Bajir will have the Noble Savage aspects of their culture played up
-The Yeerks will behave far more like human fascists than usual
-Rachel will be played straight, but Cassie will appear far more timid. After all, Rachel is a "feminist role model"
I've watched a LOT of Disney movies recently. Keep in mind though that this would be "Renaissance Era" Animorphs.