I slightly agree with Sk8. Though, to be fair, DC really is starting to darken up. Examples of this range from the Batman comics of the late 80's to early 90's, and the iconic "Death of Superman." This image also represents the rapid change from skin-tight spandex, rubber pants and cheap looking eye masks to a more advanced design that makes Superman's and Green Lantern's suits look more alien, makes Batman look more prepared for a fight against a gunman, makes Cyborg more high tech looking, makes the Flash look more speedy looking and protected and makes Aqua Man's and Wonder Woman's suits more of a symbol of their heritage and cultures.
Sure the designs aren't much appreciated by most of the DC fanbase, but its not the appearance that makes these characters heroes. It is the actions of the one who wears the suit. The Justice League may not look like how we remember them. But they are still the same heroes that we have always known for decades, and may their actions carry on for many decades ahead, no matter what the costs may be.