It would probably be best to not get into specific cases, but try to find a way that could be more general - say let a current copyright holder extend the copyr

It would probably be best to not get into specific cases, but try to find a way that could be more general - say let a current copyright holder extend the copyright of an item for 10 years for a nominal fee (say $100). The money could go to fund a website that would list which old works were still copyright protected. Mickey would be safe from entering the public domain and everything else would automatic become public domain.