I've been thinking a lot about [url=http://www.kickstarter.com/projects/missingworldsmedia/the-phoenix-project-city-of-titans/posts/626654]Update 13[/url], and CoT's plan for instancing all city districts on a massive shared world. In addition to its effect on [url=http://cityoftitans.com/forum/how-instanced-maps-affect-pvp]open world PvP[/url], this scheme also adds some interesting options for story-telling.

As an example, suppose they add a set of special, Halloween-themed instanced missions at the beginning of October. Then, two-weeks later, all characters which have completed those missions can switch to instances of the city which are being invaded by ghosts, goblins, etc.

As another option, suppose you have a set of missions which has two possible endings, depending on the actions of the player: EndingA and EndingB. Characters who have completed the missions and gotten EndingA can then enter special city-wide instances which resulted from EndingA, while characters who made other choices in the mission set can enter the city-wide instances for EndingB.