The image is created by Tomasz Kaczkowski and features all five birds with the pig empire in flames behind them. If you look closely you can see a pile of, what looks like, dead piggies to the right of the birds. Each bird has different parts of their body missing, some seem to match up to their respective powers in the game: The red bird has its head split open, the yellow bird has part of its face missing, the white bird has its entrails hanging out, the blue bird is missing a part of its face and a section of flesh from its ribcage, and the black bird, well, it should be missing a whole lot more. 

I would actually buy this version if it was real!