Style wise and skill, it is easy to pick JMM if weight and age is not an issue, but it is.

Marquez is older now, and I don't think his body type supports 140 lbs well without ring skills showing signs for loss of natural speed, quickness and agility. He needs all of these attributes, to go with his superior counter-punching in order to put a relentless attacker/rusher in Ricky Hatton to remain without control over fighting distance.

In the meantime, can Ricky Hatton still fit in a 140 lb fighting/punching machine body without suffering the ill-effects of weight reduction?

Maybe, but isn't that similar to the dangerous yo-yo diet, now made much worse, even life-threathing, for chained at its end is a life and death date against an elite fighter the caliber of Juan Manuel Marquez.

If both would only "wink-wink" and make money out of the opportunity, then it should be OK, it will be guaranteed entertaining for their respective fans.

The thing is tho', for true warriors like both of them, it'd be viewed, indeed an opportunity yes, but at the same time to mistakenly be, to recapture old glory.

Both Marquez and Hatton are bound by their rich past to over-reach and to over achieve, probable with youth on one's side, but dangerous at the actual present conditions for both. Scary really, for these scenarios are ripe for bad consequences.

A considerable amount for deep thinking is on call, and both should seek it! IMHO.