I can see him with Juve next season. He's suitable for the regista role Allegri considers very important and our current options for this positions are Hans and Locatelli. He'll gain much valuable experience till the end of the season and will easily reach 2500 minutes. So far he's been doing much better than Hans when he was out on loan so it's probable he'd win the competition with him at Juventus. What's more, if Barrenechea keeps developing at the current rate, I can see him challenging Locatelli for the starting role.