A few weeks ago, just for fun I started doing concepts for a faux Justice League CG movie. I've always been a huge fan of Bruce Timm and the DC Timmverse he helped create, and I thought it would be cool to basically design the JLA movie that I would direct if given the chance. I didn't do any huge drastic changes because I didn't want to betray the characters in terms of who they are and what they're about. I just wanted to build on what's already been established and tweak things the way I saw them. I was going to wait until I had more artwork before I posted this, but with all the freelance I've got, I don't think I'll be able to work on this again for a while.
THIS IMAGE: This pic is kinda what started the whole thing. I always thought Bruce Wayne and Clark Kent were a great opportunity to play with contrast. They both have similar features in a broad sense (Caucasian, black hair, relatively good looking) but I don't think they need to be drawn to look the same! These characters couldn't be more different, and so I tried to play that up with the shape language used in their design. I made Bruce primarily out of triangular shapes to associate him with danger, and I made Clark mostly out of chunky block shapes to emphasize a sense of protectiveness (which I think is what Superman is all about). I rounded the corners off on Superman's "blocks" to make sure the shapes were still comfortable and friendly.
I also made Bruce slightly more pale than Clark because I feel like it emphasizes the lack of warmth and is another way to appropriately add contrast to the characters.