I'm surprised at the poll results. I find it hard to believe, but I guess that there are people who are willing to spend more than 5K on a game where they think the gameplay is more important than theme.
So any theme can come out as long as it's a super fun game, and you'll buy it?
Theme also has an audio component to it. I couldn't imagine wanting a game with super annoying callouts from a theme I didn't care for. In some ways you do play the theme. If you suggest that the sound could just be turned off, why pay so much for a fun, but dull theme?
Seems like money could be invested in a custom pin that copies the fun layout and rules and you could theme it to whatever you want... or spend less, copy the layout and leave it a whitewood if you truly don't care about theme.