A game using League of Legends world

I have an Idea that I thought of about a game using the league of legends world. Like the game skyrim using the runtera world as a game where u have different races and you are part of a story and you can me the champions like help them out or something like that or like help nasus or keep xreath in the prison things like that and I'd think it would be a big hit as a solo/ co op game or like an mmo