Arcade/Mission/Quest/Adventure Mode?

After seeing videos of Halo: Spartan Assault, Spartan Strike, and Halo Wars, they all share this gameplay about fulfilling objectives that take you all across a big, big, map. Now I was wondering, what if League of Legends had that type of game mode? An arcade or some sort of adventure type mode where you get to explore Valoran and fulfill missions in certain regions or cities. You don't, of course, have to do it alone. You could have your teammates help you out. Bonus for teams of champions who are on the same group like and his little sister, getting bonus because of being part of the same group. Could you imagine what it would be like to finally explore the world of Valoran that we really wanted to know more about?

Another thing, maybe add a quest mode based on the backstory of your champion. I could experience 's older days as an Ace Pilot before the League of Legends came about. Or maybe see him take on missions outside the League of Legends.

There's still many things going on in Valoran. Might as well explore it. Plus, we haven't heard much from the Summoner's Issue. I miss reading that.