Hatton's chin may be better than Cotto's at 140 but remember,we have yet to see Miguel@147 and Hatton was rocked to hs boots by 12ko Collazo. As for Kostya,a legend,awesome fighter,but in my opinion,took too much time off when coming back from that long layoff to beat Sharmba,very very poor tactics to fight Hatton,in the UK, on UK time and now ANOTHER long break,I don't think it bodes well. If he really wants to come back,take a tune up,see how it feels and then assess the situation.
If he jumps in the deep end straight away,and loses,whoever beats him will have their win discredited with claims that it was an aging KT etc etc