More concrete than a 3 year deal taking him up to 30 years old, that Juventus probably couldn't up his wages on even if they wanted to?
Juve hold the aces, he's signed up long term. They can sit on it for another season at least before they have to concern themselves with extending his deal, IF they want to keep him. This year is probably his peak value wise, so if they're ever going to sell him, this year would be their best chance to get as much money as possible. I really can't see a pay-rise at Juve on the agenda, why would they when they have him tied up to 2017?