Yeah, I said it few weeks ago.
1) It will be after Microsoft thing, maybe they'll even invite Phil Spencer.
2) Last release before Blizzcon will be Diablo IV, which is much bigger deal than any WoW expac (of course it also brings bigger risk if they screw it). 99% it will be time to reveal Palad.. I mean 6th class we don't know yet.
3) There is brand new adventure game (also new IP?) in production.
4) Something we didn't expected just 2 weeks ago - it will be time for 11.0 reveal.
5) For sure it will be time to reveal what are they plans for Classic. Just releasing expansions? Heavy changes that suit oldschool crowd? Maybe something else? (for example I would love expanding timewalking to actually using old client and old classes).
Two big reveals + usual smaller annoucement for Hearthstone/Overwatch. And finally people simply liked Blizzcon, if not restart it in 2023, then when?