I was thinking it would be cool if Arcade mode had a cross over with duel/brawls.

Starting out 1v1 or 2v2 each team has to complete 3 objectives throughout the map each objective opens up an area closer to where the opponents start. After completing all three objectives the teams then have to brawl/duel. The catch however is the team that completes the final objective 1st gets some sort of upper hand when facing the opponents. Either a buff or a commander that fights along side them or something.

I think it would be cool.