This is what Rettenmund had to say about it:
"I've seen the new cover of Harper's Bazaar but can't post it; it's exquisite and fans will be happy with Tom Munro's work...
The main cover features a shot of Madonna behind W.E.'s Andrea Riseborough with a protective arm over Riseborough's shoulder and encircling her to her other shoulder. Big rock on Madonna's finger, though part of her hand is hidden by the long-sleeved black gown she has on. Riseborough is in a black strapless number.
Madonna's hair is very '40s and her makeup reminiscent of her look at the Venice Film Festival.
The cover? 'Madonna and Her New Movie Star Andrea Riseborough.'
There is an alternate, subscriber's cover that shows both women full-body, both in all-black outfits again, Madonna out front in slacks, a turtleneck and a black fedora reminiscent of images used to promote Sticky & Sweet. She's holding a movie camera and a film light is pointed, behind her, at a reclining Riseborough. This time, the cover line deletes the word 'movie'."
Note: the picture featured on this post is not part of the shot by Tom Munro.
Update November 9th, 2011: The cover of Harper's Bazaar Magazine featuring Madonna.