I'm hoping and banking on more Silithus story as the most likely thing.
Yeah, continuation of the Silithus quest line.
If I had to take a wild guess, it would be Sargeras' sword finally revealed at Silithus to all who hasn't beaten Argus the Unmaker at least once. Just like how the planet Argus was revealed to all without the having to defeat Kil'jaeden.
Just an Idea, but isn't that the day the new hearthstone expansion will be released?
could it be the pre-patch?
@strayedaway's voicemail mystery?
My guess would be Beta
Maybe the release of the next allied races? (Mag'har Orcs and Dark Iron)
Mage tower 100% uptime or riot.
Hopefully, the day Blizzard changes their mind about making Artifact Appearances usable only to the spec they were for in Legion for the rest of your life.
Wow, thanks for giving credit Wowhead...I posted this on the Xorothian Cultist character page days ago.
account-wide curious coins?
POGGERS
Are there even any more quests to be added to Silithus or is it just speculation?