Marca report today that Florentino Pérez will not let Zidane join any other club at the end of this season because he thinks the French is Ancelotti's natural successor for Real Madrid's bench. Even though Real Madrid will more than likely sign Ancelotti to an extension, Pérez still wants to keep Zidane close in case something strange happened.
It would probably be good to see if Zidane can be a successful coach in elite football, but according to this report, Pérez would not want Zidane to leave Real Madrid.
Zinedine Zidane's Real Madrid Castilla have recovered after a terrible start to the 2014-2015 season and are currently leading the table of their Segunda División B group. It's never easy to promote to Segunda División, but that will certainly be Castilla's goal after the signing of Martin Ødegaard. It will be interesting to see if Castilla have what it takes to be back in Segunda under Zidane.