Let's be honest, Floyd isn't unbeatable. It just needs somebody with an unwavering focus and gameplan with the ability to box. If Oscar kept up that jab and those little flurries that at least stopped Floyd's output for the whole fight who knows what would have happened.
Floyd adjusted and Oscar lost his balls. Cotto is one man who MIGHT be able to stick to that plan. Ultimately, I see him causing trouble but perhaps losing his stomach for the fight late on when Floyd has landed a festival of right hands. It'll be an exciting fight though - I can almost guarantee it.