I'm not arguing with you that he should have sited the original work in his credits, bit I'm not sure I agree that it's a total "theft." I think he should have said something like "inspired by..." and given those credits and then maybe an explanation of how he used the original poster in his work. The reason I say that is because I've seen pictures that I've greatly admired and have tried to recreate them myself. Of course, considering my talent, I usually don't get this close to the original. ;o) Anyway, what I see in this is that he used the original poster, with changes, as a photo background (like I've used sky photos), then added his version of the foreground. Maybe the old saying is true? (to misquote) Copying is the sincerest form of flattery. Hopefully from now on, he and everyone will site their sources and give credit where credit is due.