How I visualize. Superman was created during time when the world was in turmoil. Recession was at its worst,crime was soaring for many reasons,and we got the worlds first hero to deal with that. He was important and created for the importance of how we should behave in society and the repercussions if we didn't.
He was a figure created by two young Jewish men,to point out and deal with our societies flaws. Speaking against racism and slavery for the black community. That was a big step for that time,but it was a major flaw,even worse than today,and Superman dealt with it. Thtas why he was so important and meant something in the first place. But that movie and The Dark Knight,harnessed why Batman is needed in our society too.
In Batman Begins, Gotham was hit by bad recession, and I wish that could have been an issue specifically for a Superman film,as that was his issue,but Batsy got there first.
Superman Returns could have a been a movie about WHY Superman is a much needed influence on the world today,but it weren't unfortunately.
So I really hope Man Of Steel can learn something from them. Superman address the real issues of our world,what we suffer from,and be sort of the guiding light we need. He's so much more than a hero who fights Aliens and megalomaniacs,he's a hero because we look up to his influence and power of GOOD.