This is just a link to a supers site where the artist has been redesigning the looks of various supers for fun: http://dresdencodak.tumblr.com/. I really like some of his ideas. I think it would be great if DC would do a mini-series using his concepts for characters, just as a one-off.
A picture of his version of the Justice League with Green Lantern, Superman, Powergirl, Cyborg, Wonder Woman, Martian Manhunter, and the Flash. (click for bigger version)