Please can we remember that, with more detailed evidence, the WPOTY team haven't yet made a conclusion so we don't know if it is fake or not. I think we should wait for the outcome before we jump to conclusions.
On some of the comments about it being an old pic taken on his Hasselblad, a very similar image was submitted by the same photographer to the Wild Wonders of Europe but taken on a D2X.
It will be a sad day for wildlife photography if it is found to be not as stated and not the only such issue this year. In these big competitions, you are aksed to submit RAW files if you are selected for success and in a major competition in the US, a photographer declined at this stage, implying there was something wrong.
In general I think the standards in WPOTY of phenominally high and if they have to change the winner, then that could have serious implications. The book would be wrong too for a start.
Lets wait and see the final conclusion from the experts before we jump to too many conclusions. One article on the internet isn't enough IMO.