I was noticing the newest Teenage Mutant Ninja Turtles cartoon looks pretty bad, and even more bad is them taking April O'Neil and changing her into a negress. So forgive me if I sound like I am late to the party in this realization, but a sub-thought had occurred to me with the current trend of "blacking" characters:
OK, so we all know the double standards, how it's almost always blacks and not other races, etc. But a more sinister thing occurred to me: Because changing a white to black is good, and black to white (or any race is bad) it means they made a one way street.
In other words, once they have made a character black, they can't go back, so to speak. You are now stuck with the problem that making the next show, or film, or game, they can now call you racist if you wanna change this black person, even if the original version was white. So while they will applaud James Bond being made into a black, you have now made it that in the future you can never change him back to white without them accusing you of being anti-black, it's a no-win situation.