My guess for Fearless was Black Panther too... his last book was subtitles "man without fear" and Daredevil isn't using that line right now. They've said a few times, I think, that BP would be more important in the Now, and I would think that would equate to a solo book and not just New Avengers. But Valkyrie makes sense, too. Is Valkyrie going to be in the new Thor movie? That would clinch it.
I heard Namor was going to go nudist, and be retitled: 'Namor: Man Without Pants'.