Paul, I was thinking the same thing while watching Prince Caspian last night. That is, there are these cool warrior mice that are part of Narnia. It would be fun to play the mouse’s part in within the larger framework of the setting, and possibly even play out challenges of the more specific story. It might be possible to interact with humans in that case since Narnian mice are large - maybe a quarter-size of humans. I could see Prince Caspian or any of the 4 kings and queens acting like an uber-Gwendolyn. But if that was too much of a stretch, it could totally be human-free (especially if you wanted to adventure during the absence of the 4 kings & queens when Narnians became more legend than life).