These roles are meant to passed down from generation to generation .
Christopher Reeve said that he considered himself a temporary custodian of the Superman role, while he had it.
That's what I think of every actor who's donned the Batman and Zorro cowls, put on the Red S, put on the tux as Bond, etc.
I know there are fans nowadays who don't like the idea of recasts , but for me , it's a
positive thing to see these characters carry on after an actor or actress has vacated the role.
It doesn't end just because an actor leaves the role.
The mantle goes on to the next actor or next generation , and then they do their own thing with it.