Meh. Looks like a typical instance of "Let's imagine some circumstances under which I would be right, and pretend that is what happened." But anyone who can't cope with that has no business on the Internet.
ETA: So what actually may have happened is that Nichelle read some lines written for Spock, but not that she was likely to be cast as Spock, who BTW was originally going to be red-skinned, not unlike Sinestro out of Green Lantern. But it's a better headline to say "OMG Spock was going to be a black woman!"