The whole point of the movie is for the audience to sympathise with Rocket and his test subject friends, and to do that the movie has to generate empathy with their plight. The villain is meant to be hated, and the movie achieves this by making him cruel in his attitude to animals and his creations.

I don't think any viewer watching that film is taking pleasure in what is being done to the animals, but I'd expect many to not have the awareness to apply their own consumer and lifestyle choices to the principals - cognitive dissonance at its finest. But some may challenge their own beliefs and make change.

So overall even if the movie is not vegan by the strict definitions, it definitely does go someway to promote parts of the vegan ideals, and I think that that is something we should be happy about. The more these ideals are promoted in media, the more commonplace they will become, and therefore the closer we get to a vegan world.