Zidane will not go to PSG, from the beginning the PSG owner has said that he is not interested in Zidane. even a week ago the news about zidane to juventus had strengthened, even the president of Juve directly intervened to persuade zidane to want to train Juventus but all of that was successfully dismissed because allegri did not want to back down and wanted to prove that he would again make Juve rise from adversity, that is challenging for allegri.
Pretty sure if Zidane was open for the PSG move, they would welcome him with wide open hands

. PSG is some fucked up desperate club that wouldn't let that opportunity slide way.
I think it's Zidane who just doesn't want to go anywhere as of now except the French national team
Zaza has only the France joba at heart right now, time without number he has regected so many club with the likes of Man United, Chelsea and also Real Madrid for the second time, PSG also made moves for him but he had no plans for a club side
As for Alegri he will remain coach of Juventus, both Pogba and Cheisa are back from injury cases with those two back Juventus will get back to winning games as they use to do. No deal with a return of former coach back to Juventus