We know the quest names and there is nothing indicating anything about Y'shaarj or Pandaria. Sometimes, a Neltharion trinket is just a Neltharion trinket.
I don't even see how it's on the nose? Because it's the name of a patch that deals with the owner of the Artifact? Not everything needs to be 4D chess.
"Guardians of the Dream can't refer to the Emerald Dream, it's too on the nose!"