Some strong words on this subject from Polish Archbishop Hoser:
wdtprs.com/blog/2015/02/polish-archbishop-predicts-ugly-confrontations-at-synod-innovators-have-not-been-idle/
On the delegates who seek to overturn the doctrine of the Church:
“At the Synod there will be a confrontation with delegates from countries where there is already a majority of pathological families – broken families, patchwork families, with only a small percentage of unbroken marriages – and the demand for the provision of Holy Communion for the divorced. In this lies an erroneous assumption, the postulate that God’s mercy is without justice, when you must begin by saying that married and family life must be founded in justice, which as a whole is not taken into account….”
On Pope John Paul II and marriage:
"I will tell you brutally. The Church has betrayed John Paul II. Not the Church as the Bride of Christ, not the Church of our Creed, because John Paul II was an expression, an authentic voice of the Church; but it is the pastoral practice that has betrayed John Paul II.
It is a thesis [theory] to which I subscribe because 40 years of my priesthood has been devoted to marriage and the family, during which time I promoted the theme of “the evangelization of marital intimacy”. In Poland it is and was better in this respect.
In many other countries, due to the contestation to the teachings of the Church, as expressed by Blessed Paul VI, the pastoral care of families was stopped."