Originally Posted by
KeeperOfTheGarden
Islands / continents :
- The other side of the planet : I would love a secret continent unknown to everyone where Azeroth Titan is expected to be born
- The South Sea Isles : Plunder Isle, Tel Abim, Balor, Kezan,
- Dragon Isles
Open areas : some areas could be reworked into new zones, like Zul'Aman (the raid entrance would then move to somewhere else inside the new zone), Northern Lordaeron (with full Stratholme + hills/forest + elven harbor), Eastern Arathi (which I like to call "Arathi Lowlands"), northern Moonglade/Winterspring could be reworked into a brand new zone.
Underground areas : Barrow Deeps (would be perfect to introduce Furbolgs as a new race), Azjol Nerub (not the instances but the whoooole area), Bael Modern (titan facility underneath the Barrens), Stonetalon Peak (where Thrall and Jaina met for the first time), Blackrock Mountain which could become an apart zone of its own (could be a nice starting zone for playable ogres).
Others : Ancient Kalimdor (accessible through the Caverns of Time), Alternate Azeroth, some unknown planets.
That's all I can think of at the moment.