'twas a story about Jesus come tae save the world, lads. Lots of early baptismal scenes(falling into sea off oilrig, bus thing) so it was settin' itself up for a classic god v devil; even referring constantly to s'per'mans krypton-dad as 'el' rather than jor-el fairly blasted out the heavy judeo-christian message(el meaning 'god' in hebrew/aramaic) - and sending his son to earth where he would be 'a god among them'. Loads of other referrals; even Lois Lane took on an almost Mary Magdalene, self-sacrificial role(ok, that's probably stretching it). And earth dad's rather otherwise pointless death...
I thought for all that it was excellently done although a tad long. No arguments with the super-fight at the end, I'm pretty sure they could have found a better way for their christ-figure/Michael to overthrow the dragon at the end of the world a little more creatively/imaginatively.