to be honest i think if juve go down cannavaro will leave, unfortunately many clubs covet defenders of his stature and they would get him on the cheap due to our difficulties.
however, the reason canna will go is simple and it is nothing to do with money.
cannavaro played superbly well at parma but he went to inter to try and win the title, unfortunately this was inter and we all know what they do to world class players......when he joined juve he refound his appetite, desire and form and finally at the age of 29 won his first scudetto, quickly followed by another. now he faces having these hard earned titles taken away from him, even if he captains italy to the world cup he will not want to end his carrer without a title winners medal. this is the reason he will go, he wants to be a winner.