[quote=@SoulStealer]
Any advice/ideas for this are welcome, as it's only an idea.
[/quote]

I read this and it actually is a really amazing idea! Perhaps, with the GM thing, you could have it so players would have to PM the given GM and pick a number between 1 and, say, 10. The GM would pick a number, and tell the co-GM if there is one, and any players close to the number get some form of reward, the players far from the number get a disaster or something they have to fight. And the timeline that has the most players with close/far numbers gets a reward/punishment. Just thoughts.