If PSG continues with their current players, Zidane could be the new manager. What if PSG's stars don't stay with the team during the transfer season? It may be too early to talk for now. He will closely follow the transfers that will take place at the end of the season. PSG needs a big name as coach. And as you said, Zidane could be one of them.
I think Zidane can overcome these challenges. He worked with star football players before and did what was necessary.
Actually, for Zidane's current problem, I still don't know whether this will actually happen or not because seeing from his condition, I think Zidane is not too interested in being at PSG because if he was interested, he had done that from the start and even a few seasons before he has been continuously offered by PSG but it still doesn't happen.