OK...
SPOILER ALERT!
...he's from Krypton ( the planet not the inert gas)
and
... he's Super.
But seriously... I enjoy any retelling of the Ubermensch tale, but others I saw the film with felt id didn't do much in terms of character development, and it took itself a >bit< too seriously. Compare it to Chris Reeve's first movie, which had a good sense of humor. I already knew the story of Jesus Superman, so I didn't miss a complete re-tellin of the tale. I consider it a fair addition to the modern legends.
I DID feel the abundant religious references a bit too much, but easy enough to disregard.