Apparently Miyamoto Usagi will be in this season. This is actually the best TMNT cartoon there's ever been. Season one they fight Shredder, season two the Kranng (who win by the end of the season), season three the Mighty Mutanimals and Bebop and Rocksteady are introduced and the turtles start time traveling and go to Dimension X, at the end of season three the Triceratons destroy the Earth, season four the Turtles fly around space with Fugitoid (voiced by David Tennant) and travel back in time to stop the Triceratons, and then the Foot start a plan to revive Shredder. There's also a running gag per season where they have a parody of an old cartoon. I love this show.