I would assume for now teaming up with members within your server to fight against other servers. Like CWF, you would pick your team and then the team captain would sign you up. You would then be matched against teams from other servers similar to how it is done in CWF today.

The fight would be similar to sailing or Guild War style of fighting. At the end whose ever side is left standing wins the round. Winning 3 rounds - 7 rounds based on progression to quarter and semi, and finals.

Top 8 teams get a prize similar to CWF (but for all members on the team).

If you are on a newer server with a lot of weaklings, then it would be good to have 3 brackets based on power, and levels. Three championship brackets occurring simultaneously.