If true, it is believed to be the Wii Remote Plus, which includes built-in MotionPlus technology. FlingSmash requires MotionPlus so it does make sense. Nintendo has previously bundled games with the add-on module, but this could represent a shift to an all-new line of Wii Remotes.
FlingSmash, with the Wii Remote Plus, was briefly listed at $49.99 with a November 7 release date. Nintendo has told Shacknews that the company has "nothing to announce at this time."