Pikachu Kennen
So everybody knows the little ninja yordle kennen. He uses lightning and is pretty small. What does this make you think of? That's right! Pikachu! A Pikachu Kennen skin would be amazing. As long as they don't straight up call it Pikachu Kennen it should be fine in terms of copyright. There's even a Bowser Rammus!
The Q would be thunder wave. The W would be thunderbolt. The E could be Volt Tackle. And the R would be Discharge or something.
Kennen's design is just begging for a Pikachu like skin. :P