I generally dislike musicals (with some exceptions like Dancer in the Dark and Moulin Rouge!), but the Back to the Future franchise seems like a bad fit for a musical.

More so than most franchises, Back to the Future feels very tied to the zeitgeist of its time (80s to early 90s).

Then again, they made Joker 2 a musical (I recently found out about this and had to double check that this wasn’t a joke).