New Thor vs. the Midgard Serpent art by Walt Simonson! Brings back fond memories of the classic all-splash-page Thor #380 (volume 1).
Design sketch for Spider-Man 2099's costume by Rick Leonardi, via Project: Rooftop.
by Arthur Adams, from here (where you can read about how John Romita Sr. helped him lay this out).
Esad Ribic is a master of using lighting and perspective.
-My favorite one is the first image. He only fully rendered a few parts of Thor’s left arm, Mjolnir, his mouth, and his nose. The rest is just suggested and by the shading. I look at Esad’s work and I see a lot of echoes from the great illustrators of the Turn of the Century (1900-1901) and the Golden Age of Comics. This guy is GOOD. I found these convention sketches on: http://www.comicartfans.com Yeah. These are sketches. Not fully finished works. Like a said, he’s good.