

If we go by the recently Panini leak, Diablo IV is a strong candidate for the fourth blank schedule slot. So here we have an opportunity to make some wild guesses by eliminating Hearthstone, Heroes of the Storm, and Warcraft III Reforged from the four blank panels listed in the BlizzCon 2019 schedule. There is also a Warcraft III: Reforged update panel on November 2 at 6:15pm.

The schedule openly mentions a Heroes of the Storm update panel on Nov 1 at 6:15pm and a Hearthstone update at 8:15pm. It might be safe to make a decent guess that these are among them: The fact these were not specified means we should expect a mix of 4 new expansions, or at least 1 brand-new game. Blizzard Entertainment revealed the BlizzCon 2019 schedule and map - and there are at least four blank panels after the Opening Ceremony.
