Comment Re:Just imagine if copyright had reasonable limits (Score 5, Informative) 196
No; the character would continue to be protected by trademark rights. The name "Superman", the S logo, etc. are all indicators that a particular work that bears them originate from the "actual" owner of the marks; i.e., they are trademarks. And trademark is indefinite, so long as they continue in use. But that is how it should be: not just every movie studio should be able to make a Superman movie, because this would undermine the "real"/canonical Superman line. Fans could not be sure that the movie that they were going to see was the "official" Superman; the protection of trademark is therefore important to provide information to the consumer.
Now, that said, I agree that copyright's derivative work protection should not continue to prevent similar stories, so long as there is no risk of customer confusion. If another studio wants to make a movie about "Superduperman," from the planet Argon, who flies around in his caped underwear while saving the world, they should have every right to do so -- even while the copyright for "Superman" still runs.