Well, I kinda get the longetivity of trademarks but you should absolutely be able to redistribute 40+ year old movies. If a studio is still making cash off the original Star Wars trilogy, they can remain in the green despite outputting literal garbage. Trademarks should have looser regulation so that you can release a clearly-labeled parody Mario game or non-canon Star Trek animation short without repercussion, like how the Touhou community works.