Think up a unconventional champion. I'll start:

a monster truck

ITT: Name an object that would be a weird champ?

A toaster
An ottoman
A telephone pole
Cutlery (sporks do tons of damage)
A sidewalk
A chess board

A Plumber, a hedgehog, a yellow circle..

Oh, wait.

I thought this was a clever idea. Sorry bro.

A tube of toothpaste

I think they should make a 'swarm' based champ that is like a single entity made up of a swarm of say Bees or something Bee-like...intelligent swarm with a 'hive mind' that all part act together as the whole...

an all cc support with no damage skills at all.

A trash golem made of things like soda cans and car parts and such.

Oh wait...