"Forgotten" skin line
I would suggest adding a skin line of least played champions or champions who didn't get an update or skin for a while. My suggestions:
- Homeless hobo Taric with broken rain-pipe instead of mace and cardboard sing with words "I will support for food" on it instead of his shield.
- Part-time Kayle with cheap suit and cardboard sword (like in those old-school guys with cardboard arrows advertising shops in USA).
- Self-employed Renekton with a cheap suit, a cheap fedora and a briefcase instead of his normal weapon.
- Janitor Jax with broom instead of his lantern and with janitors uniform.
- Doors-to-doors salesman Yorick with suit and a vacuum cleaner instead of his shovel.
Or the opposite version (opposite of what they once were):
- Used to be popular Taric dressed like he was 18 years old popular guy, but he is 30 years old, a little bit fat and started to go bald.
- Unsupportive Kayle angry, hating, red-neck kayle with a chainsaw.
- Garage-sale garden gnome Galio all dusty, old, unwanted and with tiny red hat.
- Old confused Kennen old guy from retirement home who is visited only once a year.
- Single dad Yorick looks lame (as a person) and tired, but keeps going for his ghouls/kids.
"You're... a judicator?"
"Part time."
didn't get a skin on this list, the most forgotten champion 

: complains about needing water and her plants look dry
looks like Ursula fights with tentacules instead of ice