I'd advise you on starting smaller. Do this beta build for the fun and for learning, but try not to focus on a private owned IP if you're looking to complete a project. Shrink the scope (like, massively; focus on a 5 minute experience at the start, tops) and change the concept and characters if you're ever looking into finishing a game of your own.
If you ever consider taking this to a professional level, consider hiring animators and designers. Doing a game entirely on your own is a massive undertaking.