I think that Blizzard is pretty much done with truly "epic" events in WoW.

I missed out on the Gates of AQ, but I was around for the Scourge Invasion... which I personally loved. I mean, it's the lead up to the f'n LICH KING, baby! Yeah, there'd better be zombies everywhere, and mass zombie ganking, and poisoned sacks of grain, and floating citadels, and cultists wandering around, and undead dragons attacking Stormwind Harbor, and... oh man, that really set the tone for an awesome expansion.

Too bad so many people QQ'd / nerdraged / cancelled their accounts. I really feel that Blizzard "got the message" ~ why else was the lead in to Cataclysm so tame? The quest chains were alright (if ultimately forgettable), and it was nice to get the "Tripping the Rifts" achievement. But it certainly didn't feel like the world was coming to an end ~ not the way the Scourge Invasion felt. If you didn't bother doing the quests, you'd have hardly known that there was anything going on.

Personally I'd like to see more of Deathwing. He should start nuking the capital cities. We should have unkillable world bosses that randomly spawn and tear up a zone. We should have fiery meteors falling from the sky. There should be peril at every corner ~ elite cultist assassins that randomly show up to aggro guards and slay players. There should be tidal waves, hurricanes, crazy world-ending crap. That would be some quality tiger blood right there.