well, in the movie zootopia, the stereotype that the characters implement into the story is that the "predators" are becoming savage again. this becomes an issue in the city of zootopia because, well, zootopia is this perfect harmonious town filled with kind animals who no longer prey on one another. the word zootopia is actually derived from the word utopia, which is ; an imagined place or state of things in which everything is perfect.
so Zootopia is seemingly perfect, except for one tiny hamartia; the government officials release word to the public that the predators are returning to their savage ways, preying on the smaller, weaker animals. they claim that these animals cannot live in harmony with everybody else because their instincts are to kill, kill, kill. and in a sense, we as humans stereotype this same concept; that wild animals such as sharks, tigers, lions, foxes, panthers, etc. are cold, empty animals that cannot feel empathy, so therefore they are a threat to all who are sensitive and tiny and weak. but the relationship between judy and nick challenges this stereotype because judy is considered a prey and nick is considered a predator but they have this sort of special connection and we are able to see, from an omniscient perspective, that they're just animals. that they don't fear one another, that although they grew up with other animals that whisper about the predators, they know that they do care for each other, and they support and protect each other. they even go to great lengths to reveal the truth about zootopia and prove that these 'predators' are really not predators at all.