I know that events are on the roadmap eventually, but they seem like events that the person making the MMO would set up, i.e. an event to celebrate the game's anniversary or an event involving killing a bunch of mobs.
As a BIG stretch goal, it would be neat to see random events that come from the NPC MMO players themselves. I'm thinking about things like the Falador Massacre in Runecape or the Corrupted Blood incident in WoW. Something happens to the game and the players take advantage of it. The owner of the MMO would then need to respond accordingly.
These random events wouldn't have to be all bad, though. Players could engage in drop parties where they give other players items, or organize their own events within the game. Small stuff like this would make the fake MMO we build feel like a real MMO, where the in-game players are socializing and responding to the gameplay mechanics available.