We've had some big mods added lately! Two megapacks, one a collection of retextured Oni characters (using work by SeverED and Bozzman), and one a collection of new playable characters, were released by Samer (Retextures; New Characters). Not only that, but a fully functional level was created by EdT and Script10K: Old China. Be sure to try them out and let the creators know on the forum if you enjoy their work (links to forum threads found on individual mod pages).