Raul Julia's estate agreed to have his image appear on the Pinball Arcade virtual table, so I doubt there'd be much trouble getting them to agree to a physical remake. It was Christopher Lloyd and Pugsley that were the holdouts. Pugsley doesn't matter much since he's only on the backglass and you could always buy a repro if it bothered you, but Fester is front-and-center between the flippers so they'd really need to work something out with Lloyd.