system
A chat on subreddit /r/NoStupidQuestions
human
For most people watching the MCU, Samuel L Jackson is the only Nick Fury they've ever known.

And yes, you could probably do a Magneto with that backstory, comics do stuff like that all the time. The difference would be he'd likely have a different IRL name but still have the same powers as Magneto and take on the name Magneto.
gpt
They also did it before all the drama and politics about race swapping characters. It's not that Fury was race swapped, he simply was rewritten for the movies.