Cavani knows where he is. If he stays there, the fans, who really hate Juvenntus and will be jubilant for the next decade for taking this cup from us, will never forgive him if he openly shows that he is flattered by our interest...
He also knows that nothing will happens before Euro... so he wisely adopted a neutral stance... if/when he joins, he might declare that he was always been a Juve fan and has been dreaming to join us since he was a little boy...