Awesome. Especially since I've been reading a lot of Golden Age comics lately and have been idly wondering what a modern cartoon about the Justice _Society_ might be like, if done right (answer: It would never exist, is what it would be like. Realistically speaking). Also I recently saw "Justice League: New Frontier" and this is like the style of the animation on the intro, which I freaking LOVED. I guess I just like art deco. Good job!
I really like the color scheme on this one, just showing the important stuff like the cape and the S and the belt and the curl in the hair, with everything else in shadow. It's a great touch that really suits this poster.
the light/shadow you did here is amazing the only thing that's bothering me in this series is the black border.. I think it takes away too much attention from the actual poster. maybe if it was thiner or in another dark color...I don't know despite this, great series