In an interview with E! News J. Woww told them after going to Italy and possibly one more season back at the Jersey shore there isn't much else for them to do. 

"I think we would have done it all by then. What else could we do? I just feel like after Italy and going back to Jersey one more time we probably accomplished it all. If it ends, it has to end at the Jersey Shore."

The Situation concurs with J. Woww's sentinments and is also on record saying - "There's only so long you can rule the reality world. Maybe another year or so of reality, and then I'm gonna graduate to movies."