See, I was thinking the opposite. A minute in the Shadowlands is a month on Azeroth. We will come back from the afterlife to an Azeroth that has not had it's champions to fix all its problems for years on end.
Into the core? Like underground? That would be cool. I thought it would be neat if we got rid of the sword in Silithus, leaving a huge cavernous hole in the ground leading to places we didn't know were there. I'd love to see Blizz's take on the cave-dwelling Falmer from Elder Scrolls, and the return of the Nerubians.As for where we go next, my vote is into the core. There were some great themes and bosses with Molten Core and would love to see Tinkerers for the next class with a hybrid feel for Dwarves, Gnomes, Goblins, and Vulperan since they would make the most sense lorewise. But, it's anyone's guess what happens once there is a new Lich King to stand over the scourge. Speculation from me is we save Anduin, and Uther helps by absorbing his darkness making him the new LK, thus returning Anduin to Stormwind. I hope we get to see Varian and Tiffin again in a sort of James and Lilly Potter moment during Anduin's darkest moment. There is so much great stuff, and so many easter eggs, it is hard to say which way we are going next. I figured for sure Old Gods after N'Zoth, but here we are.