Nice post, a lot of these images take me back. I especially love the first one, the 1974 pinup of Swamp Thing. Do you think that was originally published in a fanzine. The 1977 Con cover is another great one. I had never seen that Hulk vs Superman piece, great job on that.
Thanks. The first time I saw the "ultimate" Swamp Thing pin-up was several years ago from an internet art broker, Black Line Fever, and I'm not sure if it appeared in any publication--anybody know?