UPDATE: someone over at the StarWars.com forums asked Sue Rostoni from Lucas Books about this. She's confirmed that this is not the cover, although it turns out that she e-mailed DelRey suggesting it as a potential prototype for the design, just a few hours before the image surfaced here. The Force must be with our forum members! Click the link to read her full commentary.
And, of course, TF.N will bring you more news on Shadows of Mindor and the rest of what LFL are doing, just as soon as we get it.