I would like to see Ratzinger's Eschatology in Verbum/Logos. It's the final volume in the Dogmatic Theology series done by him and Johann Auer. Two of the volumes by Auer are available already. This one, and the rest of the series, would seem to be worthy additions to the software. Ratzinger's book in particular is often cited (e.g. Gospel of Luke by Pablo Gadenz, Catholic Commentary on Sacred Scripture). Though I have it in pdf, I would love to get it connected to other resources in my Verbum library.
