Is there going to be a supernatural video game

Actually YES. http://www.deadline.com/2011/03/mcg-launches-comic-imprint-plots-haunted-city-as-first-transmedia-project/#more-119250

As for a game based on the CW series, it looks like there's a trailer out now: http://www.youtube.com/watch?v=MPRafJrIU6s

Those links both lead to fakes, don't waste your time like I did!!