In Legion we had a lot of class campaigns take place around Azeroth, such as resurrecting four new horsemen, bringing new elemental lords to the battle, clearing out the remaining people in Darkshire, etc.
I do wonder if they have plans to put all these stories we've already started into play in 8.0 and revamp the whole / some parts of the old world. We also know they really want to implement level scaling in old content so I'd assume that would be the perfect time to do so as well.
What would you like to see changed in a new revamp? I'd personally love to see Ashenvale and Auberdine (in Darkshore) get fixed.