In my humble opinion of Real Life Superhero,
Every Superhero is unique, as much as every PERSON is unique. I'm <X> and ENTOMO at the same time, and logic imposes that nobody could assume my legal identity of <X> in the future to come. Because, I AM <X> and I'm actually an unique person like everyone is.
On the other hand, yes, I need a mask to be "recognized" as Entomo, but Entomo is much more than a mask: he's in my genetic code. And nobody can replicate in himself my genetic code, left alone my experiences of life.
So basically, my point is: NO. Each one must get his brand-new, unique Superhero persona. My legacy is something I'll carry with me forever.