You're the community, you should have a voice in how this is setup if a third one is attempted.
With that being said, what would you like to see?
A league? A tourney? Freeze? set team size (example: 4v4)?
point system or no? just wins and losses recorded? all games on one server or some alternative format or best of 3 etc. ?
I doubt this will see many views since I waited too long to bother posting this, but if you drop by the forums feel free to let me know what you think and what you would want to see happen.