I hope 10.0 is all about revamping the iconic zones, local threats + the threat of the expansion being slapped on top via sharding in zones that are relevant to the story on a grander scale...
And with a revamp, full updating across the board of visuals on mounts, mobs, npc races, textures, trees... Everything that looks old-as-F!
If it's yet another CoSmIc tHrEaT! of an expansion, I might just lose my appetite. I think after so many years, I lean towards enjoying grounded zones that change Azeroth itself over going to new worlds.