New ALL RANDOM ALL GAME concept for Rotating Game Mode!
Wouldn't it be fun if an ARAM game mode came out, where each time you die in game, you revive as a random new champion? This would mean refunding items at the shop should be 100% gold upon death/not leaving the fountain, so that people can't just go back to the fountain to change builds.
I think this mode would be great for people who just want to kick back and try out a bunch of new champions in a short amount of time.