a Dinosaur champion? And whatever happened to Ao Shin?

I know that Cho'Gath has his whole prehistoric skin, but I'd like an actual Tyrannosaurus Rex to be a champion!! A jungler dinosaur maybe!! A Tanky T-Rex, or maybe a Raptor with a similar stealth bonus to Rengar and Kha'zix. And by the way.. whatever happened to Ao'Shin? It's not like we can deny he exists thanks to the udr comic.