Samsung has released one of the best phone designs lately by releasing Galaxy A7 and Note 4 both of which look better than offerings of HTC and Apple. Spigen is one of the biggest accessory maker and today it has leaked Samsung Galaxy S6 official picture on its amazon’s sales page.
Often case makers get specifications and dyes of upcoming devices from companies so that they are able to offer them at launch. So it may not be official picture but very close to official. Spigen has been doing this from past many years and they do in fact have decent track record.