I am here to tell you about a relatively new wiki that I have made, called When Worlds Collide. I guess you could call it a collabrative fanfiction in which every fictional universe crosses over. The wiki has more information on the story, of course.
As of this blog post, it has 12 pages, all of which were made and edited by me. Most of those pages are stubs, and I am calling anybody else who is interested to help fill them out.