Lego recently released their largest model with over 9000 parts, the ser 10276-1 - The Colosseum.
Following that I thought of collecting for you a variety of pictures and particularly cool MOCs of Lego gladiators.
Enjoy:

A Day At The Circus "Gulp!" Centurion vs Stag Gladiators ready! ¡Ave Caesar! Morituri te salutam Morituri Te Salutant Collectible Minifig Apartment - Gladiator (Series 5) Gladiators ready! Global Gladiator Monsters Into The Arena Marketplace & Gladiator Arena The Marketplace LEGO brick Colosseum v2 gladiatorfight5 A Champion Emerges: A BrickArsenal Gladiator Contest Entry Are you entertained? Dinosaur Gladiators

Cover photo credit: https://www.flickr.com/photos/132764302@N08/43399808251/