I'm not sure why you are being so obtuse here and jsut refusing to listen to what I'm saying so I'll answer the same questions again, in the order you asked:
His backstory, already established through many books and films
No, that is not what I'm effecitevly saying. I've explained it in great detail twice now, I don't know how clear I need to be about his backstory
Yes, but you change the character. And you seem insistent that it is the character, James Bond, that has the intrinsic value. Not his role as 007. I'm arguing it's the 007 role that makes Bond bond and you can change that character all you want. I'm not sure what you're not getting now, I've repeated myself a few times but you don't seem to be understanding as you keep asking me the same question?