Depends who has more left in the tank, I'd defo lean towards JMM. I tend to think JMM takes better care of himself & stay's in relative ring shape year round. Where Hatton seems to have been taking a pounding in his last major's + his post fight "Ballooning" is bound to catch up to him, If not already?
Marquez by late stoppage. His style is suited for aggression, he may have trouble due to size early on but his superior boxing skills and warrior heart will get him to win this one by the 10th. Hatton isn't bad but I don't think he's the better fighter, nor do I think he'll be in better shape. It's a good test for either of them to demonstrate whether or not they still got it.