[@Vilageidiotx]: Obviously it will not work for every roleplay, but the superhero genre (the sandbox roleplays that I have and still am participating in) can usually accomendate for this type of storytelling.  Eventually, someone's villain will become a threat greater than only on ehero can handle.  The JLA, the Avengers, or an equivalence to these teams will eventually form to face the threat.  Heck, it does not necessarily have to involve uniting a team of heroes (things like Ultimatum - not the greatest comic but a good example: a "game wide" event that affects everyone but has originated from one of the player's rogue gallery).