You might want to have a look at the intrepid Andrea Tornielli’s article in La Stampa (in English) about the proximate need for a a new Prefect for the Congregation for the Doctrine of the Faith. Card. Levada is coming to the end of his term.
Tornielli tosses out some names. I guess he had to. There is, however, the possibility that the Holy Father will keep Levada in that post. After all, he himself, who longed to retire and write, was kept in place by John Paul II.
Pius XII was his own Prefect for the Holy Office, by the way.
In any event, lots of people are speculating about who would be the perfect prefect.