Announcers and music packs
A simple and easy way to cash in, create an announcer that, well, announces things. "Your turret has been destroyed" "QUADRAKILL!" stuff like that, but in different voices. Quite a few games have done this, but LoL has not, and I'm fairly certain that they would sell pretty well too. We know lol can do this from the bilgewater announcer, so why has this not happened yet?