Interesting question.
How would a paying public view a re-boot of the Batman series, on the silver screen, were it to star an african american as Batman/Bruce Wayne?
For example, if Don Cheadle put on 25lbs of muscle? I like his acting chops in an attempt to pull off grisled vigilante. Could he pull it off to the tune of $500MM in gross?
They would have to rewrite his whole story all over. Unless they did some type of alternate universe story.
Now, when batman's back was broken he was nursed back to health by a black female doctor, and I believe they had a short romance.