His hand isn’t backwards. It’s literally the art treatment (the streaks of white) that make it look ... different. I’ve seen the untreated image (just the soldier without the logo or art treatment) and it’s a normal left hand. (I think we discussed this about a year ago.)
Do you guys take real photos for the cover art or is it just heavily edited?
It’s cover art. There will be artistic treatment. For example, In the Name of the Tsar for Battlefield 1 featured a female soldier with a shaved head. She’s actual a real person, a model who lives in Los Angeles.