Several problems with this.
1. No predefined rules. (We won't do this for you.)
2. Too many players.
3. Spammy. (A natural consequence of 1 and 2.)
4. The fan fiction forum idea was denied. (Basic premise can be considered identical, based on the idea that both are forms of storytelling.)
5. This is in the wrong board. (Please put it in the right board next time.)
6. Overall low predicted post quality from this community. (If you can prove otherwise through example, you'll only have to deal with the other 5 points.)
Thanks for the idea, but for now it is definitely rejected. Furthermore, I will ask that you do not try to do a counterexample to number 6 in this board. A clan board, perhaps, would be much better suited for it.
Closed.