I’m fascinated by any piece of media created as an original project, but then forced into an already existing franchise. Maybe I’m not searching correctly but I’m finding it hard to find examples of this happening. For film I know American Psycho 2 was forced into the American Psycho IP without having any prior connection, but I was wondering if there are more well known examples?
Editing to say a lot of the replies are exemplifying why I love this topic. It feels like many spin-offs or adaptations are pegged with people saying "this was probably originally something unique" or something along those lines. It's a very fascinating criticism to me which is why I love the projects that really are confirmed to have been initially something original!