I think the big Azeroth macguffin is gonna end up being the well of eternity and/or the old gods.
It doesn't make sense why the legion keeps coming back to azeroth, and why azeroth is so special besides those two things.
They've gone out of their way to clarify or retcon that the well of eternity is still there and still has a part to play (even though we went to the maelstrom and it wasn't there anymore)
I think i remember seeing it hinted that it's somehow under the ocean now? But I really don't get how they would tie in Nazjatar to an expansion anymore after cataclysm.
I dunno. The story has been shit for me since Cataclysm, since they just don't seem to be interested in advancing the story in any meaningful way because they're scared of upsetting players. Now they especially don't care, and you can tell because they haven't released a book or anything for this expansion. It's just themes and story thought up in a lunch meeting to have the setting and characters. They're obviously invested in Overwatch now.
i feel like they arent investing in the story of warlords of Draenor because its basically only for the benefit of the game "experience" to play on an actual Draenor rather than something that is important for the lore.
no idea why they thought it was a good idea to have it like that other than needing some "extra time" to work on the next expansion from a lore/game standpoint.
The next expansion is going to be interesting simply because we'll see where they are going to go next and what future expansions might be -- no one has been clamoring for an updated Northrend like people were for Outland (which ended up being Draenor) so i can't imagine it being an updated Northrend/Lich King.
i suppose Well of Eternity seems like the most likely thing at this point. Maybe the Maelstrom stops or something stupid like that and then we get Kul Tiras, access to the Goblin area, all of the other stuff in the middle of the ocean we didn't have before.
The Blingtron encoded message stuff sort of eludes to some other odd stuff.
One theory I heard awhile back was that the world Azeroth was like (an egg for?) a baby titan. Which is why the titans have been haven't completely purged it, even with the presence of the old gods as it's too valuable.
i never heard anything about a "baby titan" even being a thing at all. I thought all of the Titans operated out of the Pantheon and i don't remember anything about them propagating. I thought there were just an unknown set amount of them.
the Old Gods storyline definitely seems like something that has to come back, and how they interact with the Burning Legion, if they do at all, is an interesting thing to consider.