Faction tournament

I think it'd be fun to have a mode where all factions have so many champs (3 or 4) represented. They must fight until their nexus is destroyed. Once it is destroyed, they are out of the game. Winning team has a nexus.

Ionia, Noxus, Demacia, Bandle City, and Freljord in an all-out contest to see who has bragging rights. Just an idea. I'm sure some other areas or regions would work. I just like the concept of a 5 team elimination battle.