Message:Because DC is a "Multiverse," and there are at least four "black Supermen" I can think of, at least one dating back to at least the 1980's.
So, not only could Nas X be cast as Superman, it would be a "canon" comics Superman.
First black Wonder Woman goes back to 1973.
Took till 2001 for a black Batman, and it took Stan Lee to do it.
Yours,
IronMike
12-Oct-2021