I'm not blacking anything out because I've given a spoiler tag in the title, so if you don't want heavy spoilers don't read on.
Several things came as surprised to me after listening to the voice of Xal'atath, Blade of the Black Empire. From the things said by the blade, and looking on wowpedia, certain things have now been changed around by blizzard in what I can only assume is a retcon.
Before this, we use to assume from what the lore gave us that the old gods were these supremely powerful beings that matched power for power against sargeras and outside of him nobody elves compared to this. Now however we learn that the old gods are infact servents of the void lords, the rulers of the void, creatures that make sargeras look like jimmy olson fighting megatech lexx luthor. Void lords are meant to be so powerful that they are the reason sargeras went nuts and is trying to convert the universe by killing worlds corrupted by the old gods (again servents) meaning there are many many more old gods out there, because said planets are capable of becoming titans, but if the old gods corrupt the planet they will become dark titans and kick sargeras' ass.
http://wow.gamepedia.com/Void_lord
(Thats right, those void callers that warlocks can summon are now apparently the most powerful beings in existence in warcraft lore)
Also, just out of nowhere, it turns out sargeras already killed off all members the pantheon, Aman'Thul, Eonar, Norgannon, Golganneth, Khaz'goroth and Aggramar, all dead, apparently published in World_of_Warcraft:_Chronicle_Volume_1 (
http://wow.gamepedia.com/World_of_Wa...nicle_Volume_1), just as a side note, nothing we really needed to care about.
http://wow.gamepedia.com/Pantheon
I know blizzard can be bad at their lore sometimes, but to me, I'd put having the death of the patheon and the existence of void lords a bit higher up on the list of important lore facts in the games story then wanting to know what emotional state Jainas that month.