I totally get the challenge, and I had a similar assignment last year. What helped me was finding a page that lists a bunch of creative Shakespeare research topics, including ones that bridge literature with history and philosophy. For example, I ended up writing about how Shakespeare’s depiction of fate in Julius Caesar reflects Renaissance philosophical ideas about free will and destiny. If you want, you can check out this link https://www.customwritings.com/howtowrite/post/shakespeare-research-paper-topics/ — it’s not just a list, but also gives some direction on framing those interdisciplinary connections, which really made my paper flow better.