Game modes

I know this might be hard to implement but im just throwing out this game mode idea. I was recently playing an mmo called SMITE (mythological league type game) and in it they has a game mode that changed each day going from male champions vs female champions or champions from on culture vs champions from another.

Can league do a game mode like this or is it a copyright issue by HiTechGames. Because id liek to see game modes like noxus vs demacia or bandle city vs shivering isle. Maybe some rivalry like jarvin vs swain or brotherle like draven vs darius or tresh vs lucian.

its just an idea id like to see come into play. I know the riot team has allot to but if they could give this some consideration.