A number huh...like two
The only black people I can think of was Morgan Freeman and Debo.
Now that I think of it I don't think there have never been any black actresses in any superhero movies expect for Halle and Zoe's (and they're bi-racial, but I'm sure they were counted as black
) limited parts in the X-Men movies.
This is why I'm glad I don't support these movies at the box office. At least they throw black actors a bone here and there, black actresses don't even exist in the mind of Hollywood, unless they are looking for someone to play Mammy.