The problem with video game themes isn't the audience. Gaming BLOWS AWAY both the movie and music industry by a long shot.
Issue is pins and games are both vessels for interpretation of a theme. You can make a game of Tron, and a pin of Tron. But a pin of a game is just weird. It's like crossing some weird boundary and creates a confusing product.
Take Uncharted. I can't go out and find treasure and fight bad guys, so I can simulate that through a game.
A fan of AC/DC can buy the pin and experience the feeling of a concert using the machine in their home.
Now why would a Zelda or Mario fan want to play a pin of the game they like? It's not providing a better experience, just a different one. Is that worth it $6000 instead of $60?