I am not opposed to the changing of characters races where it won't derail the original character. With Black Batman it depends would he be a relatively new character with a different origin, or would it just be black Bruce Wayne. If it's the first it might be interesting, see Bat-Wing, it's a pretty enjoyable comic. But if it's just black Bruce then it kinds of alters his character pointlessly and for the worse. I've always said Batman and maybe Superman are the only Justice League members who have to be white. Green Lantern wouldn't change if he was Chinese or Aquaman Samoan. But Bruce Wayne's origin is pretty much privilege old money. Which is majority white.