Besides Spiderman and Batman, 'The Flash' has, hands down, the best villains. You could do a TV show about The Rogues, and there's enough depth and interest and oddly honor amongst those characters that I think people will watch that show.
One of the best decisions we made on the 'Arrow' pilot was to have the Deathstroke mask. Within 30 seconds, you knew you were watching a DC comics show.
Sometimes the worst thing you can do, personally, is the best thing you can do, professionally.