I have a hard time believing it though. A lot of times fan art is created and people try to pawn it off as concept art. This feels like that.Simply because it's not detailed enough.
Concept art is usually extremely detailed with color and precision. These are black and white images done in a very simple style. They would be useless to a director, director of photography or costume designer.
But, you never know. So, here they are.
Concept artists from IMDb are Matthew R. Cunningham, Jock, Jerad S. Marantz, Michael Meyers, Manuel Plank-Jorge, Steffen Reichstadt and Raj Rihal. Production design is by Andrew Menzies.
Update: A couple of sources have confirmed these are not concept art from the film.
What do you think? Are these real G.I. Joe Retaliation concept designs?