In one of the anthologies we read for the book club, there was a story that came from a shared fantasy world (if I understood correctly, multiple writers wrote stories in the same setting).
I find lots of different versions of collaborative creative projects interesting, and having a shared setting that lots of people are free to write in is no exception. The idea I've been turning over in my head is a sort of two-stage process where stage one is for a small group of folks to collaboratively do some structured world-building on a discord server.
For example, if it is a sci fi world, with multiple alien races, each person is figuring out some stuff about one species of alien and how things went for them at some major interstellar summit in the setting's history, etc. Something less rule-driven than an RPG but with a bit of structure to it. And then after some history and major figures and what not of this setting are set down, we write up some stuff that reflects the "core" of the world/setting and lay that out, and then stage two is for people (the same people or new people) to write stories set in this world (probably later than the events that were established, but who knows).
This is the current state of development of this idea, and I basically am wondering if anyone has suggestions/advice/desire to participate in something this.