Yora
Legend
As Morrus said, the main issue with such things really lies in the basic idea: If you have multiple people working on something, esecially if they are supposed to come up with things by themselves, can only result in a large pile of things, but won't create anything coherent. It's a large number of micro-settings placed side by side, with people adding aspects to things created by others without understanding the creators intentions. It can be done, but is very unlikely to create anything that anyone will really want to use except for one or two one-shots that ignore most of the content.