The 4th duo Harold, The Beatbox King, is Tony Stark The Iron Man for Mad Marvel. He will be against DJ, the real mister nice guy, as John Stewart the Green Lantern for Tenacious DC.
I really like both guys and this is cool! It is very difficult to choose who would win. Due to that DJ is one of the strongest but one of the nicest charters on TD (few others who are just as nice) so I can't see him wanting to hurt Harold and Harold seems to be on the up with DJ so I don't see him wanting to hurt him also. I guess I go for Harold as the winner of this battle as he has been more battle ready then DJ as shown in the past (with mix results as Harold either pawns all with his mad skills or accidentally hurts himself or lose focus).