Blizzard already has the private forum, and has for many years.
The PR stunt forum is meant to create an illusion that they suddenly listen to feedback.
You could always contact the community council members on their twitter… woops their already being cancelled and removed from the CC for racism.
Things are imploding exactly as predicted.
“Representatives” 
Well, according to what was in that discord about Black humans, some of them do in fact represent a certain part of the playerbase, just not the one Blizzard had in mind.
The entire thing is such nonsense. All it’s going to do is add to the egos of the people invited, while making everyone else feel unheard and blizzard’s gonna claim it as proof that they’re listening to the “community” for the PR and continue to not make a good game.
Yeah, I sounded like a shill with that comment. It’s not going well.