It would have to be one of these 5 (due to popularity): Hulk, Thor, Captain America, Dr Strange, or Black Panther. In that order
IMO. Stern isn’t gonna take a chance on “lesser” heroes/themes right now (Daredevil, Captain Marvel, or any of the smaller “teams”). Why would they? Personally, I’d like to see other characters and groups get their due, but Stern knows the upsides/risks better than us.

I would instead love to see some risk-taking with mechanics and magnets on a Dr Strange pin. Or a more humorous approach to Thor (Ragnarok style) or Hulk. And if Keith designs it, I don’t really care. Yes please.

Stern likes a variety (music, comics/toons, TV/movie) in most recent years, so I would love to see: Black Sabbath, Mandalorian, Masters of the Universe (Skeletor edition), and The Watchmen (comic edition). But we’ll probably get Rush, Getaway/High Speed 3, Thor, and Transformers (again, but comic version). Not holding my breathe for HP, BTTF, or Jaws anytime soon either.

New Poll for predicting the next Stern pin going on “r/pinball” on Reddit right now. BTTF leading Mando at the moment. MK and Godzilla closely trailing.