I would be very careful about putting ANY extra effort into this. Even if you are making it available for free, copyright holders have the right to shut you down in the blink of an eye (most notable case is SEGA shutting down the group that made a modern style Streets of Rage).
If you are using someone else's IP, it doesn't matter how you're making it available - it's VERY dodgy ground.
I would hate for you to pour your efforts and love into this and produce something brilliant, only for it to be canned due to legal action.
On the plus side though, it looks lovely and should be great additions to a personal portfolio for whoever made the screenshots.