JuicieJ
SHOW ME YA MOVES!
There was a topic on this already in times gone by. But people (on the whole) are still undecided on who he really is. Some say OoT Link, some say SS Link, some say he never even was Link. Really there's nothing conclusive to say who he is, despite some people insisting there is solid evidence.
He may well be the dying soldier in Hyrule's back alley for all we know...
He's most definitely a previous Link. He directly said that he accepted life as the hero and constantly refers to a bloodline between he and Link. We just don't know which Link it was, and, with the official timeline out, it can be one of 4. I'd say MC and FS Link are out of the question, though, personally.