One theme that I am not shocked that it was never made, but would still be interesting to me would be MacGYVER. Anything could be used and incorporated into the game. Any location in the world would fit the theme. You could hit certain shots and collect different items to complete modes. There could be timed modes to escape a sinking boat, car being crushed in a junkyard, a locked walk in cooler, etc. There could be a magna save that looked like a roll of duct tape. I don't know how a swiss army knife could be included, but even if it was on a lever switch to launch the ball it would be kind of cool.