This is an interesting idea.

If we were to have skins, we wouldn't have the seemingly looming fights over "I think Tyf should be in JJ3!" or "No, EvilMike and Bobbu deserve spots!"

However, my big question is, what kind of new special attacks could they have? After all, there's only so much attacks possible that would look smooth. Adding more rabbits would gradually start to be less and less creative. We'll likely just start slapping on names: Gazz, Hazz, Kazz, Lazz, etc. It just wouldn't be in the spirit of Jazz Jackrabbit.