Here I thought this scenario would give us hints towards the next expansion. But then it was revealed at the end that...
Sargeras is coming for us and we have to go to Argus.
Wow. Thanks Blizzard. For all those that haven't payed attention in the last 5 years, and for which the big fucking Argus in the sky and the Kil'jaeden kill cinematic wasn't enough of a clue. Now everybody knows that Sargeras is after us and we will go to Argus.
I know there were Void creatures and minions of the Old Gods, too, and they talked about the world soul, but none of that was news either.