No one likes what happened last year. To many, it was a cutthroat backstabbing expedition by Inter to severely weaken Serie A, to others, there is some merit to the accusations. The truth is, as always, somewhere in the middle.
Fact is, even at his age, Cannavaro is one of the best defenders in the world, and one of the best four defenders linked to Juventus, IMO.
The other three being Mexes, Milito and Marquez, of which, only Mexes has any Serie A experience. Mexes has never won a Serie A title, nor has he won a World Cup... Cannavaro has. Cannavaro has a proven ability to make weaker players and younger players around him better. Mexes is also the least likely to come, as Roma will fight relentlessly to keep him.
Juventus would be fools not to bring him back, its just good business. Any of those 4 as well as someone with untapped potential like Barzagli or Criscito would be awesome, but Canna is probably the easiest to attain.