It's useful to remind ourselves of the theory popularised by Taliesin, that Blizzard's take on a World Revamp might simply be to send us to the other side of the world, and pretty much reboot the lore over there.
Kalimdor and EK would still exist (with small enhancements), and purists could still play Classic for that true Azeroth experience. But for the retail crowd, the "WoW 1.5" experience might simply be found beyond the waves.