Quite a few more leaked images are out now with the release of the Age of Sigmar book just right around the corner. Some of this information has been revealed already, like with the Fyreslayers, but there is a lot there, as Lady Atia has the book in hand and is leaking lots of images.
Here Posts start here
Some Highlights so far.
Nurgle and the Great Horned Rat are Allies
Gorkamorka and Savage Orruks