For all those who want a black Doctor so badly, I just don't see Moffat throwing continuity out the window. They've been beating the "ginger haired" thing in the ground (which is a continuity thing tied to a 7th Doctor story). So unless we're getting Dennis Rodman, Sinbad or Wesley Snipes from Demolition Man, I don't see a black Doctor happening.
This new Doctor seems to be Moffat taking the opportunity to close Doctor Who continuity. After that, all bets are off.