David Goyer Reveals Why MAN OF STEEL Isn't Called SUPERMAN

I've never had an issue with the new Superman film being titled Man of Steel. After all, Superman is the Man of Steel. But in case you were wondering why, during a recent Podcast with Empire Magazine, screenwriter David Goyer explains their decision saying,

I would say that the marketing began early on in that we decided not to call it Superman, that was very deliberate.

That was Chris [Nolan] and I, Man Of Steel, and Warner Bros. said, ‘Why?' And we started talking about it, and we said, ‘We want a line of demarcation in the sand between the old and the new.’ We always knew we would be using the Superman glyph or the shield as we call it. But Man Of Steel was also supposed to represent our take, which was he’s a man, but he’s not made of flesh and blood, metaphorically he’s a man of steel. So that was sort of like the whole thing wrapped up in a nutshell.

So there it is, and it makes sense to me.