>>88819241You said it yourself, it's a detective movie, not a mystery. They didn't set up multiple possible suspects, they let you know right away Ratigan is the culprit, even Basil knows that much.
The fun is watching Basil work the case and follow the clues.
And for that matter, we don't find out what precisely Ratigan is planning until it happens. We can work it out based on everything we see, after all it's a kids film, but Ratigan never says "I'm going to have a mechanical replica of the Queen mother appoint me as her royal advisor and usurp the throne"
