Special thanks to HISSTANK Boards Member SwordMonkey, we now have several in-hand images of G.I. Joe Retro Line Wave 4 (the figures are literally in hand).
These figures were located in a Walmart in Central New York.
Each case only contained Stalker & Cobra Trooper; 3 each for a total of 6. As we discovered, it is now clear that Wave 4 only consists of 2 characters and it is also likely that Wave 5 is close behind with 2 more.
You can check out the images, after the jump.