[Retric]

Edit: I think the point is the law needs to be changed anyway, so there are options in how you shape a new system.

Anyway, characters can also be trademarked, so you could have a magic school in a movie that's not named Hogwarts and a little boy not named Potter etc. So, you can have similar stories using different charters, but your forced to produce an original work and not use or imply 'based on X'.

There are also rules that let you use others trademarks. So, you don't need to pay using a ford car in a movie, or having an older song on the radio.

We could also have a longer copyright that caps to 7 years after first sale or public performance.

My point is simply there is a lot more flexibility than total control forever, that still preserves artistic control in their lifetimes.