|Disneyland, Anaheim, 2012|
But the concept works only when a film or series is essentially abstract enough that characters, at least how they look, become more interchangeable. That sounds more common in comics or fantasy.
This might not work so well in films tied to specific personalities or characters where appearance somehow matters. My own screenplay "Epiphany", in a sci-fi spaceship setting, has about 15 major characters, and three are black. But for some of the characters, looks matter and do influence what happens to or with them.