Personally i believe that Hatton will win this one. I wasnt that impressed by Pacmans stoppage of David Diaz who i feel is very limited. He looked awesome in stopping De Le Hoya but we just dont know what De Le Hoya had left. Now i believe that Pacman is a far better fighter than Hatton but i am a great believer in styles make fights.
I think Hatton will be bigger and stronger than Pacman and will be able to bully him somewhat. I wouldnt be shocked if Hatton won by stoppage around 9 rounds. However there is always the chance of Pacman stopping Hatton due to cuts and/or swelling.

And im not saying this because im a massive Hatton bacause im not. I just think hes wrong for pac man.