If you don't think this would be a great theme, you must be a single guy, who is over 60 or under 30, and just generally out of touch. The immense popularity of this movie with women alone would make this a great seller. Every married pinball collector would have the go ahead to buy. Plus many men, myself included, also put this as one of their favorite movies of all time. There is also enough content in the one movie to make two pins. It would be an auto-buy at my house. The theme song was our first dance at my wedding. How is this not a top 5 theme for themes that haven't been done? What is better? Harry Potter? Sure. Superman? Maybe. Jaws? Nah. What else? Nothing.

Right, sorry. I forgot how important the college kid demographic is for buying pinball machines of 30 year old themes. Everyone loved the Twilight Zone I had in my dorm room.

You can't come back from being dead. You can only come back from being mostly dead.

What themes would be better?

Asshole. You really got my hopes up. Now my day is ruined.

The best TV show ever (The Boys could threaten this) but not a good pinball theme.

Goonies is right up there; I'll give you that. I would still put it lower than TPB but I think a good argument could be made for it. Back to the Future is a great theme but has already been made. A new game would be ok, however. I love the other movies you mentioned but all would be clearly inferior to The Princess Bride as pinball themes.