Greetings. I don't think it would be outrageous if Hatton fought again. Hatton can still beat a lot of quality fighters around the 140 lb weight class. I woudn't mind seeing a match up between Hatton and Tim Bradley. Plus Hatton has a huge following, which is good for the sport.
On the down side, Hatton already has a ton of money so there's no real reason to fight on other than pride and glory. Also, Hatton puts his long term health at risk every time he steps into the ring. Then again, so does every fighter. If Hatton wants to fight on I would respect his decision. But if he returns and starts getting KO'd by second tier fighters then I think people should start pressuring him to quit.