Gamemode Idea for League

So I was thinking about cool things in league and the thought came across about another game mode. The Idea is a Battle Royal, where every champion is played by a player. And the champion you pick goes to its champion region from the lore, like garen and demacia. Each faction from the lore will battle it out until each others bases are destroyed. Unlocking many possibilities for New Items and New Champions and who knows more factions to come across.