I further believe Real Madrid a strong candidate champion there is no particular reason just my hunch
Zidane is one part of Real Madrid a few years ago I think he knows what it takes Real madrid
Zidane is a legend as a player for Real Madrid and if he could made Real Madrid be the champion this season this is could be awesome achievement because only several people could do that and Guardiola and Luis Enrique already did it got spanish league trophy as the player and as the coach
He could and he will, winning the champions league is a much harder feat that he has accomplished so winning the spanish league should be easy for him. He might or might not be able to win it this season however there is still many other season to come and he will get it sooner or later