It' not a new pose. There's a B&W Raiders publicity still I think with Ford in that pose. Maybe wrong, but I've seen this done elsewhere quite recently, as I say it's a good way to get something slightly different to what everybody has seen before, and have new artwork.
No, I found the photo it's based from. The body is correct (but not the jacket, or face) in comparison to the photo. A different facial expression in the artwork compared to the still.
Not a criticism, just observing. It's nice to have different art.