Those who are hoping that the pope will proclaim a new dogma concerning Mary as co-redemptrix will likely not see it during Pope Benedict's pontificate.
Cardinal Ratzinger stated this about it in an interview published in God and the World (Ignatius Press):
“ I do not think there will be any compliance with this demand, which in the meantime is being supported by several million people, within the foreseeable future. The response of the Congregation for the Doctrine of the Faith is, broadly, that what is signified by this is already better expressed in other titles of Mary, while the formula 'Co-redemptrix' departs to too great an extent from the language of Scripture and of the Fathers and therefore gives rise to misunderstandings.
"What is true here? Well, it is true that Christ does not remain outside us or to one side of us, but builds a profound and new community with us. Everything that is his becomes ours, and everything that is ours he has taken upon himself, so that it becomes his: this great exchange is the actual content of redemption, the removal of limitations from our self and its extension into community with God. Because Mary is the prototype of the Church as such and is, so to say, the Church in person, this being 'with' is realized in her in exemplary fashion."