Next ultimate skin idea!

Hey everyone, i thought i found out a pretty neat ultimate skin idea that has been sitting in the back of my head for a while. Up until now we've got Udyr-jungle, lux- mid, sona- support and Ezreal- adc, so the only thing left is a top champ, and i think i've got a nice idea.

Imagine a gnar skin in a ben 10 styled setting, as in, you are a regular small gnar with perhaps a special device strapped around your body resembling some sort of energy core or suit, and you get to choose one of many monsters/aliens you can evolve into during your mega gnar form, ranging for an ice monster, to a swamp-mud monster, a giant squid monster thing, etc, each with their unique recall, sound effects, particles and ability VFX.

What do you think? Or what do you think the next ultimate should be?