Trying to be a bit creative
Baron Nashor: The most hideous, monstrous thing ever? Justin Bieber
Top: Cole from infamous, he would be duo top with kennen and then never die because he just regenerates electricity from kennen. Also he one shots baron because baron is in the lake.
Mid: Lilith from borderlands cuz of her stealth
Jungler: Cheryll (i think thats her name) from portal so i can have ULTIMATE GANKS
Adc: learn2fly penguin. Cuz penguins are awesome. and he can fly. and somehow he gets money from flyiing and some guy sold him a nuke warhead.
Support: Bomberman. To replace zilean the wannabe bomberman