The first 3-4 rowes look alot like the Scott Johnson remakes, I think he was a product designer over at Marvel. He had to turn 'classic' comic book pieces into a newer '3D' form for toy packaging and stuff like that. Here are a couple things he did ( he did a damn good job too ), and yes, these are going to be posters.
P.S the fact that he made these upcoming posters for Marvel probably means he's the creator of the pic that Ryche has posted.