You can't change everything at once. Either you make him black, or a woman, or a black woman, or a black woman in a wheelchair, or a black woman in a wheelchair with a wife and two ethnically different children (by her wife - who may or may not be a woman), or you change the plots. If you change
everything at once it will fail dismally and lose a ton of money.
I remember when Bernie Ecclestone said he really wanted a black driver in F1, but he had to be REALLY good. Because he knew that if a mediocre black driver came in to the sport and he wasn't good then it wouldn't help matters at all. Same thing, if you're going to make Bond black (much preferable to making him a woman btw, just as Miss Marple should stay a woman) then it has to be a film so good that no one can criticize it. Which is gonna be tough given that if you change everything at once people will say 'it's not a Bond film'..