I hope for Scourge expansion in 9.0, because it's perfect opportunity to intruduce new class - Necromancer:
- it would be ranged, cloth, pure dps class - they never intruduced class like that
- it would create hype (like DK and DH)
- 99% hero class to avoid Artifact/Class Hall problem
- I know it can sound too similar to Affliction or Unholy, but DH also was 'impossible', because Demonology had Metamorphosis, and more important, people said that Necromancer is impossible in Diablo 3 because we have Witch Doctor - see how it turned out
- two spec - one focused on pets
Leveling and story would start in area north of Eastern Plaguelands, with Stratholme as neutral capital (city have no use in open world anyway, dungeon would still be set in the past). Later plot could move to Old Kingdom under Northend and we find out more about Void Lords. This expansion could end Bolvar and Sylvanas plot.