I have been a fan of the Redwall series for more than a decade now and I am extremely excited about this mod! Too bad there won't be Cluny the Scourge or Slagar, but I like that you're going in your own direction so you can have a bit more license to do what you want as far as story goes. The screens look great already!
I will totally play a badger when they come out. I was wondering how you plan to increase their bulk. Obviously, badgers and a few other creatures in Redwall are larger or smaller than others and it would be cool to see an actual difference in their mass in game.
And I love the idea of using Jacques as the Abbey Recorder. Perfect role for him, one that he has actually used before when referring to himself in a few snippets I've seen him do for the Redwall TV series and in forwards and the like for the books themselves. You should send him a letter or an email after you release the mod so he can see that. I bet he'd get a kick out of that!
Anyways, good luck with this brilliant concept and have fun with it!