Well I would be in favor of 2v2 tournaments with a split prize for the winning duo.
Also maybe a 4 man free for all for the semi finalists of a standard tournament.

If I, as the BattleGrounds 'groundsman' were given the authority I could make all sorts of cool death trap style arenas for special themed matches. Suspended platforms over an Acid pit? Frozen indoor arena with rabid polar bears? Fighting on top of a Colossus Eagle? 

Dynamo is your man.