Champion Mastery lvl 5 Reward idea

I was just thinking that one should get a reward for leveling up a champion to Mastery lvl 5. My idea is that at the moment you reach lvl 5 with a champion you will be shown a short cinematic scene of a champion. The scene could show something about the champion that the lore hasn´t said. Or if not that just show a little bit of an important part of the champions lore. Either ways i think that would be really awesome :))