I'm a huge fan of Mario, and appreciate the NSMB series for paying homage to the plumber's roots. But after two iterations, I would've thought that Nintendo would start to take some creative liberties. Maybe switch to sprites (ala Wario Land Shake It) instead of 3D models. Change up the setting, maybe return to Dinosaur World or something. Hell, just changing some of the world themes (SMB3 had some really creative concepts like Giant World, why are we stuck with generic grasslands, deserts, and tundras?) would have been a welcome departure from the norm.
Oh well. I'm probably going to get this and enjoy it anyway. But part of me does hope that this is the last we'll see of the NSMB series as we know it. I think Mario's ready to start innovating in 2D again.