In DC1M, J'onn had literally become Mars:
[img=http://s3d4.turboimagehost.com/t/16915168_1.jpg]
[img=http://s3d4.turboimagehost.com/t/16915170_2.jpg]
[img=http://s3d4.turboimagehost.com/t/16915172_3.jpg]
Although MM1M should logically be a LOT more powerful that his regular self, given that he's...you know...a fukkin planet, he didn't do anything in the way of battle feats.
I'd still give him the win, though.