Here are some new, updated, or different covers for some upcoming releases previously included in a Weekly Wishlist post.
The Second Empress by Michelle Moran. UK release March 2012 (I've also seen this with the title Empress Josephine's Crown so I'm not sure which title they are going with)
UK cover of Kate Quinn's next book Empress of Rome (in the US, Empress of the Seven Hills)
Elizabeth Norton's biography on Bessie Blount. Recently released in the UK; will be released in the US in March 2012.