In fairness, the only real moneymakers from that list are Overwatch and Hearthstone. We could maybe add WoW to that list due to the die hard players still paying a subscription (if that's still a thing?) but Warcraft, Diablo and Starcraft and basically hibernating IPs at this point. None of those hibernating IPs have seen any major movement or releases in _many_ years. Starcraft is still viable as it's considered to be a mainstay of completive RTS (and therefore great for branding of Blizzard in general) but I don't think it's earning them buckets of money.

So we're down to 2 properties making the majority of earnings, both on Free to Play but not Pay to Win models. That model has a very distinct shelf life of, I'd say, 5 years before you need to either release a sequel or change it up with a new IP.