EA and DICE launched their official homepage for Battlefield 4
The page states that "The more fans who log in, the more we'll reveal", with the gameplay premiere coming March 27.
The entire page features a hazy piece of concept art that you can furiously swipe at to reveal bits of the image at a time. I took a quick look at the page's source code and found the unaltered image shown above.
Check back March 27 for the gameplay reveal and all other news.