I’m afraid CS wouldn’t be able to provide any more information than is currently available to the public, Dottie. That said, the blog says this specifically:
Create Your Character
If you’re eager to claim your character name in WoW Classic, take note: we’ll be opening character creation on Tuesday, August 13.** Players with an active subscription or game time on their account will be able to create up to three characters per World of Warcraft account. We’ll have more information on realm names closer to launch, but rest assured—you’ll have plenty of time to figure out your plans for realm domination!
Since it calls out, per World of Warcraft account, I imagine you’ll likely be able to have more than one. I don’t have that officially, mind you, just based on what is already stated.