Scripts could happen, but you'd need a hell of a lot more training data than we have now though. There are like 700,000-800,000 movies and maybe a few thousand of those are reasonably popular. You could probably make something that reasonably graded scripts without someone having to read all of them.

Animation is getting damn close. AI can generate the set completely and with the latest changes in image stability you can puppet ai art with generic actors. We're still lacking style though. One of the strong pulls in animation are the particulars of a shows art style. You can see one frame of the simpsons, southpark, futurama or bobs burgers and know what you're watching. it's still a little early to ask AI to make a full cohesive piece frame to frame