Tor have released the rough sketch of the cover for A Memory of Light (the final Wheel of Time book) that Darrell K. Sweet was working at the time of his death last year.
Michael Whelan will be providing the final cover artwork. He is working from a totally different image from the book and will not be re-using any of Sweet's ideas.
Sweet's rough cover is interesting. Obviously, the three women are Elayne, Min and Aviendha and the funeral bier is presumably Rand's, with the unified Aes Sedai symbol in the background. More curious is the pyramid-like structure on the left, which does not appear to be a familiar location from the books.
A Memory of Light is currently scheduled for release in January 2013.