It's Hollywood, so there's going to be diversity among the girls; white, Asian, Latina, etc. No doubt there will be 1 or 2 "token" Black girls and that will be delicate, as some will consider the Black girls the obvious choice.
But the show's target demo is white girls and hopefully the theme will be Black Man Conquers All Women. They will have many post-date opportunities for the women to say that the Black man was superior to every man they've known, to coyly denigrate "little" whitebois -- and for the white girls to strongly hint that they will be Black Only after this experience.
It most definitely will be mixed on the women contestants. However to be fair they should have half the women be Black as the normal Bachelor has at least half the women White. But I doubt this will occur and I am sure most of the women will be White. But it might not matter if the Bachelor himself prefers a certain type so perhaps the selection should be based more on his type.