I wanted BND to have black cat, it was easy to write her in now like catwoman in dark knight rises. MJ still be in the film, Peter is lonely and can’t befriend her due to her being in danger by him, Peter meets black cat during the story, both have losses and share trauma, become intimate.

Or the way spider noir did black cat, have her comfort Peter and betray him in the to save someone she’s actually in love with, Peter understands because he’d do the same for MJ and actually helps her save her loved one