If he never manages again, he may go down as the best ever. If he comes and fails to win CL then he be dropped down a notch à la Pep with Bayern.
If he does come back I hope it’s for the (France) NT, he’ll lead them to Euros ‘20.
As for Barça, this is would be very good news imo. Despite what many say about his tactics he was a great man manager and very good in match changes.