If there is one person in the DC Universe that could beat Batman in a hand to hand fight, I would say it would be Dick Grayson. With all the emotion and history between them it was a great fight to read on page, but it would have been one hell of a fight to see on the big screen.
I do hope if this does happen we can get a Nightwing vs Deathstroke scene. The younger fans may not remember the rivalry but it was one of my favorite hero/villain relationships when I was growing up.
I would love to see that too. Though, I may laugh out loud at how silly Two Face/Deathstroke looks! I'm just glad I wasn't drinking anything this past Wednesday when they revealed that. I couldn't stop looking at his face and laughing. Poor decision by the writers on Arrow.