HP would be a slam dunk theme. You've got lots of characters, separated into different dorms, it mostly takes place in a castle, lots of monsters and spells...
But it will never happen. $500,000 in licensing to Rowling is like me not bothering to pick up a penny. It's not like she needs the money and she actively DISLIKES pinball. Sounds weird, but there's people who hate videogames, cars, gambling.
She's also very involved with all projects, Disney didn't take Harry Potter park because of her oversight. Not saying that's bad but something else to consider.
I've heard rumors as to next JJP and you'll all be very happy if true. But give up the ghost with Harry Potter.