The Vaticanisti blog concurs that Archbishop Levada isgoing to be named prefect of the CDF, but then says that the same sources mention Father Fessio as his replacement.
Not that I don’t think it would be great to see him there, but I’m very skeptical. From my (albeit distant) point of view, there’s been nothing in Father’s communications or activities that would indicate such a move. As far as I know, he hasn’t even had an audience with the Holy Father yet.
Of course, I would probably be the last to know, but still I would give that rumor very low potential for being true. I’m sure they’re chuckling at Ignatius over that one.