champion mastery rewards

ok so when they released the champion mastery program they said eventually it would reap some kind of reward. well i was thinking they could create cheap skins (like 520-750 quality) that you can only get threw the champion mastery and you could even have them have common themes like slayer talon,yi,zed. destroyer garen, darius,vi. warlock ahri, swain, brand. ect. so all the slayer, ect skins would look similar to each other (like the arcade/pentakill lines) i realize that means creating 120+ skins but all im suggesting is little more then the chroma skins maybe have the top teir mastery logo on the skin somewhere but nothing really fancy. i think it would be cool too for some of the people who dont/cant buy skins regularly to have something for their favorite champs