The new Star Trek movie doesn't come out until 2013. If I had to guess, I would expect Stern to make a Star Trek themed pin around that time.
But yeah... I'd love to see a great Star Wars themed pin released one of these years. Nobody has hit one out of the park with that theme yet. Also, if done correctly, a Harry Potter themed pin could be the greatest pin ever made. So much material to choose from that would lend itself perfectly to pinball.