Even though most people will see an animated film as a related text of lower sophistication for the AOS, Pixar Animation studios fill their story-lines with meaningful character development and morals. Every character by the end is usually enlightened in some way. Finding Nemo, (so long as you analysed it REALLY well) could work. You could probably use these as belonging points:
* The trench scene - dark and foreboding representation of a blockage for Marlin, the fish skeleton on the rock perhaps a symbol for his fears of what happened to Nemo, strengthening the sense of detachment from each other
*The fishing net scene - teamwork/working in unison (positive sense of belonging), although the tropical fish colours of Dory, Marlin and Nemo are vividly contrasting to the dull hues of the harbour and other fish, their actions case them to belong and be accepted into the new place
*You could bring in how people are susceptible to be forced into belonging, ie Nemo in the fish tank - a new and 'fake' representation of his home place (negative) however the people (well, fish) within it accept him
*Gill and Nemo sharing the same 'bum' fin, or whatever they called it
Anyway, they're just a few, probably not in-depth enough to score really well...you'll have to find some pretty complex techniques that represent the AOS, or get a different text. Good luck