I'm sure that the hero is the reborn Lord Nerevar. Only the real Nerevar could wear the "Moon and Star", could overcome the trials and the sickness He is definitely not only a guy who was at the right time in the right place. Azura herself says that he is what he is (and she must know it, because it was her "prophecy" that Nerevar would come back when his country and his people are in need of him)

And it's really not a problem that you're posting in english.