It seems like a number of superhero comics (which I am lacking in citations for) have focused on the idea of the superhero as more a symbol rather than a person. Any worthy successor can pick up the mask/costume/cape and continue fighting crime in the name of Fooman, and thus Fooman becomes a legend rather than a single person. In the words of The Sandlot, "Heroes get remembered, but legends never die."

The Dark Knight had an interesting take on this with the impostor Batmen in the beginning using guns, and the real Batman showing up to stop them. (There's something to be said about culture and intellectual property in there too, but that's for another day). I'm sure there are plenty of other good examples as well, but my knowledge of superheros is rather sparse as I was unfortunately never that big into comics.