Have to go with the theme, need to remember the target market. Comic store. I agree x-men, spider man, anything that has ties to comics. We have 10 machines in a location(brewery). 1WMS and the only people that play it are pin heads. My sterns do awesome, popular themes. Simpsons, monopoly, walking dead, kiss, South Park, super mario(money printing machine). People feel better dropping 1$ for a newer machine. You would have to set older machines for 50c. I new stern at 1$ per play will do the same as 2 old wms at 50c and you are not risking people saying wtf is this game?