I think it has great potential. Alice Cooper's shows/persona were very theatrical. He had magician James Randi on his team participating in show design for a period of time. Remember, a pinball machine won't be showing an aging man going about his daily life. You'll see highlights from a long storied career. Given his theatrical horror style shows I think it's a great fit for Spooky.

And it's a boutique pin. They don't plan or need to sell several thousand of them.

EDIT: Bonus if a Megadeth pin comes out of this relationship. Superb imagery and Dave Mustaine is Alice's godson iirc. Another theme that probably wouldn't have mass market appeal but could be a successful boutique run.