There was a peek at this one on the cover to Stormlord Rising, but I notice it is now up in full on Amazon.co.uk, where the book is advertised as being available on August 4th, so here it is. (It will be available worldwide around the same date. I notice that over on Amazon.com they mention the kindle version as being available on August 1st.)
This portrays - at least I think it does - Lord Uthardim, and the dunes of the Red Quarter...
He has a large part to play in this volume.
I think I love this cover best of all the three.