Recently, a letter by C. S. Lewis was posted on a literary website showing Lewis’ opposition to making his Narnia books into movies.
“Anthropomorphic animals, when taken out of narrative into actual visibility, always turn into buffoonery or nightmare. Cartoons (if only Disney did not combine so much vulgarity with his genius!) would be another matter.” He added that he would find a “human, pantomime” version of Aslan the lion to be “blasphemy.”
So, there you go.