The Man

"In my vision at night I looked, and there before me was one like a son of man, coming with the clouds of heaven. He approached the Ancient of Days and was led into his presence.
-copied from here.

As I understand it, a "son of man" is just a man whereas "one like a son of man," coming on heavenly clouds, means a supernatural humanoid being, thus not a man. 

Bertram Davis has this Messianic status at the end of Poul Anderson's Virgin Planet:

"'Welcome,' said a voice. 'Welcome, Man.'" 
- CHAPTER XIX, p. 147.

However, in contravention of fictive conventions, it is Davis' women friends that save him - and save the day - at the end, not vice versa. Perhaps the Messiah acts through his followers.