I am in a slight dilemma. I want to develop a board game that is based on an old game show. I haven't developed it yet, but I don't want to put in all this effort into creating something and have the company who has rights to the game show reject my idea. Should I develop it first then try to sell it to the them, or should I ask for permission first? And how can I go about making and selling the idea if I don't get a patent? Is there something minor I can change that would make it different?