Fables and Fiends was supposed to be a port of the PC title which was titled Legend of Kyrandia: Fables & Fiends. Two sequels followed on the PC but the SNES port never materialzed.
I also seem to recall a contest SEGA ran together with McDonalds where the winner would see his game concept turned into reality, although I'm sure the winner's ideas were barely used at all. I don't ...