Legate Jarvan IV (skin)

This is pretty simple, cannot understand how riot hasn't already done this.

Dress up Jarvan in Centurion armor. Swap his spear-sword thingy with a pilum, and put a tower shield on his arm. Make his standard a roman standard with SPQR under an eagle. And change his ult's fissure into a giant Colosseum!

NO-BRAINER!