Same issue. Uninstalled Bnet. Took forever to reinstall it. Finally reinstalled. Game stuck on “initializing”. What a great idea to come back to WoW after a year and face this garbage.
edit: Roughly five hours later, leaving bnet on “initializing” it just randomly decided to update. Fun times. No idea what caused this, no idea what fixed it. Just uninstalling and reinstalling everything and waiting.