Yep, Napoli was a dangerous and competitive team last year and it still is. Insigne is very good just like Lavezzi. Even Vargas has a lot of potential. Anyway, their CBs still suck.
Now, I really can't understand why people think Roma improved so much, honestly.
Look at their first team: Stekelenburg; Balzaretti, Castan, Burdisso, Piris; Bradley, De Rossi, Pjanic; Lamela, Totti, Destro.
Balzaretti is Ok, but highly overrated. He's just a OK player. Castan is decent. Burdisso average. Piris used to be major SHIT here in Brazil, for 2 years.
Bradley is average. Pjanic has potential but far from getting there yet. Lamela the same. Destro is decent now, has some potential, but is also overrated. Totti in big decline. Marquinho is real average material, the same for Taddei.
They have some youngster with potential, like Dodo, Lamela and Pjanic. But they are all projects. Bojan is also very overrated.
Honestly, I don't see a big threat in Roma.
It's definitely Napoli, Milan and Inter. The last 2 have every chance of being a big failure again. Napoli is a dangerous team, but honestly, Juventus is way better.
---------- Post added 16.08.2012 at 17:12 ----------
And I wouldn't worry about Fiorentina. At all. If they are very, very successful, they could dream about fighting for a CL position. They have improved over last year, but it would be hard not to.
TBH, if mercato ends like it is now, Juve would have great advantage over the others. Pole position for the championship.