Thanos kicked a whole load of ass in Avengers: Infinity War. While he obviously had some help from the Infinity Stones, he's clearly an excellent hand-to-hand warrior, as shown by him going toe-to-toe with the Hulk in the opening scene on board the Asgardian ship. But, if this leaked photo is authentic, then it seems as if he's going to switch up his fighting style in Avengers 4 to accommodate a new sword. And it looks absolutely brutal.