Im going with Hatton by a relatively wide UD. With Mayweather in Hatton's corner it seems, from what i have heard in interviews, that Ricky is going to start fighting more intelligently like he did before he became champion. If this is true then i think he will punsih Paulie who has looked slow and easy to hit of late. Although i am expecting a much better Mallinaggi to turn up as maybe he underestimated his last couple of opponents and wasn't prepared enough. Still, even if the best Mallinaggi turns up if Hatton fights with his head i still see him winning comfortably and wouldn't be suprised if Ricky becomes the first man to stop Mallinaggi via a rib breaking hook.
If Malignaggi went the distance with Cotto I don't think he'll get stopped by Hatton but he'll probably lose. Hatton will outwork him and win most of rounds.