Mark Coale on Marvel Rotating Artists On Series posted February 29, 2012
Seems like they have been doing it for a while now. First, it was rotating talent on arcs, on things like Morrison's bat books. Now, you've got announcements of books with rotating talent. Daredevil was announced doing that with Marcos Martin and (someone else).
Of course, I wonder how much it effects sales on tegular superhero books, where you have so many inertial buyers.