Creative people should be able to create. Trademark/copyright laws, protecting assets for the great-grandchildren of who actually created the art, has never been a positive. The only people who benefit, are themselves not creative (or else they would create, instead of defending "rights" and "image").
And seriously wtf why shouldn't, like, Jack Kirby's grandkids get a share of the huge bounty of stuff he created for Marvel, but Elon Musk gets to inherit emerald mines from his dad?
Because it's cool.
I hate to be glib, but no they shouldn't.
Creators should be allowed to create things and sell them. No one, whether the creator, or the company the creator worked for when they first created the thing, should be able to stop someone else from creating something.