I think it would be freaking awesome, and I wish they would do it. But I don't think it would be popular, just because after you play it once you know what happens, and a lot of people probably just wouldn't be interested in it in the first place. It sounds like it would be impossible to make it multiplayer. It would take an incredible amount of resources and time to make a story mode for each champion, too. Maybe one day they would do something like this for each city or something, so you get to play through a story for all the characters in Piltover, Noxus, etc. Not likely but we can always dream...