Random server spawned global quest events?
Like...
Server: OMG WTF??!?! EARTHQUAKE!!!! LEGIONS OF HELL HAVE BEEN RELEASED UPON THE LAND!! COME TO KELDRIN'S DEFENSE!
Player: Ahhh! Someone help! A hellbot just spawned in my zone! Come kill him!
Hellbot: URGHSZHZHHAA!
Player2: HYAH! I bashed Hellbot for 940 damage!
Hellbot: Arrgh!
Hellbot drops pile of diamonds.
Just something fun and different to get players to run around killing things for small (yet worthwhile) rewards. Different levels of bots, of course, for different levels of players. With random names so you'd have to work to find them instead of just #tracking. Like Hellbot232 where the number is different everytime one is spawned. Maybe we can see a return of the old enemies....Trolls, Ashens, Mal, and Wolven.