I don't have the knowledge to set up a tournament but I think this would be a good idea.
Basically you have to have won at least 2 debates and lost 0 non-troll debates to enter. Exceptions can be made.
I think this would be a good idea as there are so many good debaters on this site who haven't faced each other yet, and it would certainly create some potential HOF contenders by the end.
If you want to set up a tourney you should strongly consider this as an idea.