http://m.biz.chosun.com/svc/article.html?contid=2015030801321
Regarding these special edition, Younghee Lee, VP of mobile marketing(who appeared as the master of ceremony in the Unpacked event in MWC 2015) told to Korean journalists as follows...
“갤럭시S6 어벤져스, 아이언맨 에디션이라고 불리는 제품 이미지를 본 적 있다”며 “삼성전자는 작품의 제작사인 마블과 파트너십을 맺고 있어 소비자들이 스페셜 에디션을 진정으로 원한다면 충분히 고려할 수 있다”고 말했다.
"I've seen the product images (circulating on the web) called as Galaxy S6 Avengers/Iron Man edition. Samsung Electronics have the partnership with Marvel entertainment, so in case consumers truly want those special editions we can consider (the collaboration)."
이 부사장은 “스페셜 에디션의 의미가 배경화면 테마, 액세서리, 제품 등 어디까지 될지 모르겠지만 충분히 콜라보레이션(협업)을 진행할 수 있다”며 “우선 월페이퍼(배경화면), 오픈테마에 적용할 계획”이라고 말했다.
"I'm not sure about the extent those special editions can achieve like wallpaper themes, accessories, the products, etc. but it's highly possible we could do the collaboration. We will apply to wallpapers and themes first."
Actually, it's already there. AFAIK, among the themes Samsung showed the first time in MWC with S6/S6 Edge was the Avengers theme.