I've heard that the new Campaign book may as well be called Angels of Speed: Codex White Scars and Raven Guard (hearkening back to 2nd edition's Angels of Death). This
is the article I read about it. Post #463
in this thread has a lot of images in spoiler tags if you're interested in the books. I could copy+paste all the stuff instead of linking other sites but it's a lot of images and I gotta get away from this computer for a bit. Enjoy!