The Axe Murderer was a destructive force of nature in the UFC. Watch his final bout, against Brian Stann, where the two men swing, and swing, and swing, until one (Stann) falls down. Silva was known for bloody bouts with wild action, which is why fans loved him. Turn him into a monster heel, and you could have a lot of success. Play up what a scary looking guy Silva is. Play up his violent past. It's simple really.