...are there any black characters in Watchmen?
The Watchman had No black superheroes.
In one of the meeting of The watchman team, on their board-of-problems, one of the topics is "Black Unrest".
There is however 3 black characters with minor roles.
1. The kid who is reading a comic that paralells a story point, is black. He doesn't speak much.
2. The prison psychiatrist that interviews Rorshach.
3. Said doctor's wife.
There are images from the movie of the young man reading the comic available on the net.
The power structure is very conservative in the Watchman Universe. US won Vietnam. Nixon wasn't impeached! And that power stucture is white.