Him going to Juventus. He has Milan blood, and already said plenty of times he will stay at Milan, wants to become their captain like Buffon did at Juventus, and wants to become a club legend. With the Chinese takeover pending, and a great young generation of Milan players, Milan is likely to be equal to Juventus in the not too distant future. Now IF the Chinese takeover won't go through, he will still never go to Juventus. He'll go to Real, Barca or a PL club.
So to answer your question: If the Chinese takeover is going to happen, it's very unlikely that he'll go anywhere in the near future (5 years +). Juventus is out of question, regardless of what will happen with Milan.