Why not both at once and the same time?
We are forming teams or tribes... Why should there be only one game?
Maybe there is a BIG game where all the Poly teams fight it out. Then there may be a challenge, like between my team and some other well known team. You know who you are
Then at the same time, we might have 1 or 2 teams fighting it out with a group of CFC regulars who organise themselves by email
or in a well hidden refuge in a friendly port and a team or two from the other sites.
In other words, the limits of this game(s) are only those we place upon ourselves.
Have fun and cheers.