Nobody has said that any of that isn't going to happen though. We know literally nothing about what exactly is going to happen lorewise
Pandaria has literally had no importance in anything ever aside from people liking pandas and it being a way for blizzard to put a panda model in the game.
It is literally a joke location.
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"First thing that crosses my mind: I didn't get any GameFAQs Karma yesterday." Math Murderer after getting his appendix removed.