It seems that Steve Rogers, the iconic character who still believed in America and mom's apple pie is far too antiquated for these modern times (that are such a vast improvement, don't you think?).
Not only will there be a new person wearing the (previously) red, white and blue costume, the costume will be new as well. Much of it will be black and the upper part appears to be some sort of metallic/chrome material. The new look was designed by artist Alex Ross, well known for bringing a sense of realism to superhero art.
I'm probably not the best person to be writing about this: I was never a huge Captain America fan as far as reading his own comic, but I did like the character a lot for the same reasons that many of us did. He represented a simpler time, when we knew what was right and what was wrong as opposed to the present-day inclination to paint everything in shades of grey. He was a strong man with an iron will and convictions to match. Although he wasn't super-powered, his closest analogue in the DC universe was Superman in his belief of truth, justice and the American way. Those things seem quaint today (and "American way" was even excised from Superman Returns, yet another reason to dislike the movie).