Activision-Blizzard (ATVI) the stock holding company, Blizzard Entertainment, and Activision Publishing - two of the sub units under the stockholding company.
While WoW seems right now to be one of the main teams with issues, it is broader than that - esp at the management, HR, and senior corporate level.
Yes, it did impact the Diablo team too - remember this is not all just about the sexual harassment, but poor workplace treatment as well.
You can read what former CS and Diablo CM Nevalistis had to say here.
And yes, I did ask her before posting the link on the forums.