The battle, or maybe it is a war, is ultimately about whether we can know God and trust what he has revealed. Most of the teaching of the Second Vatican Council was issued in the form of a Decree, solemn teaching meant to inform the Church and individuals. Four documents were issued as were issued as "Dogmatic Constitutions", these were intended not just to teach but to form Catholic theology, to identify what was de fide, of the faith.
It is widely known that the young Father Joseph Ratzinger was one of the major authors behind the Dogmatic Constitution on the Word of God, Dei Verbum. In it modern biblical science is examined such as text and form criticism, the examination whether a document is meant to be a story, a myth or an historic truth, it examines the authorship of scripture by God and man, and the relationship between Scripture and Tradition. It sought to answer Modernism and Literalist Fundamentalism.
Modernism: basically said that scripture was a purely human invention, which means it is powerless, and God does not touch humanity.
Literalist Fundamentalist: would have scripture dictated by God directly into the ear of its human author, which is simply nonsensical, it denies a Catholic understanding of Grace and human co-operation with it.
Practically every word the Pope has uttered or written since his election as Pope has been on God's revelation to Man. His emphasis on the Hermeneutic of Continuity says that God has been present in his Church for two thousand years and can be indeed be trusted, we have not been left orphans. His book Jesus of Nazareth is continually stressing that the Gospels can be trusted, which is so important when most theologians and most scripture scholars follow the Protestant line of the unreliability of scripture. His Wednesday catechesis on the Fathers and St Paul stress the continuity of the Church from Christ to the present day, and God's continued guidance. The Synod on the Word of God, which was a bit lack-lustre, but more importantly the eventual release of his response to it, is crucial to this Papacy and I am sure will emphasise God speaking to his people.
I really do believe that we are entering a period in the history of the Church which touches on issues as important as the Christological controversies of the first millenium. It is about the very nature of God himself. The Pope alone, and those who gather with him, stands for the continuation of the Catholic faith: God speaking directly through Tradition and Scripture, God touching directly the lives of the faithful through the sacraments, Man being saved by coming into contact with God in his Church.
The Pope's almost manic ecumenical work with the Orthodox, his inter-religious dialogue, his reconciliation of Traditionalist groups, of talks with groups of "Catholic" Anglicans are all about strengthening the position of those who believe God is "knowable".
The battle, the war, is about whether we can know and trust God.