I have to do a (3000 word) case study on Stevenson's Jekyll and Hyde and its 1931 adaptation (starring Frederick March and directed by Rouben Mamoulian) and the 1996 film Mary Reilly and address the process of adaptation itself. I have to make my own question/angle through which to study them and I can't think of anything. I really work better when provided with a question I can answer so this is awful for me. If anyone can help me out, that would be amazing!
What's the class? What grade level?
This is an interesting thing to have to do, seriously. It must be for late high school or college if it is 3,000 words, because that is about 10 pages.
What you need to do is appreciate some of the themes of the story, and think of the truths to which they point? Isn't this story about bringing nonliving material to life? Does that remind you of anything from modern times?
What about asking what hidden truths about artificial intelligence can be discovered in the story? If that is your interest, you can look at the process of adaptation and see if that truth was maintained.
It's the same with any other question you come up with. Think of something cool about the original book, and then ask if it was maintained throughout the adaptation process.
You'll need a good database. Has your school got a good database with articles about the adaptation? There are articles about the adaptation, for sure...