I am just a sucker for nearly any kind of concept art. I love being able to see different iterations of characters and the development of sets and other things. One of my favorite artists by far is Constantine Sekeris. Thankfully he has recently updated his blog with new images from Green Lantern, Thor, Fantastic Four, Spider-Man 3, Hellboy and more. A small sampling of his work can be seen below, but check out his blog for even more fantastic art.