So while looking around on eBay today, I stumbled across This auction for something called the "Cordless Elite" for Sega Genesis, which is essentially just a wireless controller for the system. Only problem was that this was never released, and only this mockup exists for it. That and this magazine scan for it: So... Is this worthy enough to get a page on SegaRetro? Just wonderin'.
Someone should write up a wiki article anyway and include the ebay photo. Make sure to mention that a similar product was actually released eventually.
I think it should be clearly spelled out here that the controller in the Ebay listing is a mock-up prototype and doesn't actually work. Just in case someone blows some mad stacks thinking otherwise.
http://segaretro.org/Remote_Control_System#Cordless_Elite Added it to the wiki since noone else would.