I'm in Anaheim ahead of the conference because I work in advertising for a company involved in loot boxes, generically speaking. Pre-conference workshops and socials are happening now, not Blizzcon just lootbox stuff.
Allegedly people have seen material related to the next WoW expansion, an update to Pandaria where we liberate Krasarang Wilds from an Evil Pandaren takeover.
Don't have any more information but I can hear the political QQs already.
Proof: