Though Nintendo's quirky, somewhat under-the-radar throwing game FlingSmash doesn't seem like the most likely partner for the launch of a new accessory, it would appear that's exactly how Nintendo is handling it. The GameStop listing for the Artoon-developed Wii game shows that it's bundled with a "Wii Remote Plus," and still due November 7. Given FlingSmash's MotionPlus requirement, we can safely guess that the Wii Remote Plus is a Wiimote with the MotionPlus already all up in it -- a trick we've seen from third parties.
Nintendo confirmed the existence of the controller to Eurogamer, declining to offer any more details. No GameStop listing was found for just the controller, leading us to suspect that FlingSmash was always intended as a pack-in with the Wii Remote Plus (its Wii Play, so to speak) -- which neatly answers the question of why Nintendo would make FlingSmash a full-priced retail game. We're contacting Nintendo for more details, since it probably knows a bit more about its own release plans than GameStop.
Update: Nintendo has "nothing to announce at this time," a representative told Joystiq.