User blog comment:IamJakuhoRaikoben/Chapter 333: Man and Man, Dragon and Dragon, Man and Dragon, Review./@comment-288216-20130531161328

Contrary to what we thought, it seems that the "shadow" isn't Future Rogue himself. The "shadow" possessed Rogue at some point, turning him into what his future self is now. During his battle with Gajeel, the "shadow" tried to possess him, but remarked that it was too soon.

You guys were right for not adding the "shadow" to Future Rogue's page. But Mato is still the king >.>