While this is just a teaser trailer, this has certainly become one of the most hyped up films of next year. While I am not a huge fan of Superman like a I am a Batman fan, I am aware of the mythology and am currently in the process of reading the Man of Steel comics by John Byrne and Dick Giodarno; and from what I've seen, this will be a more "grounded in reality" version of Superman.
The story of Superman is almost universally known by everyone, I'm not going to bother writing the whole concept of the plot. Plus it's a gigantic spoiler if I tell you everything! I'm not going to ruin your joy a year before the movie is released.
The notoriety of the trailer mostly stems from its beautiful tone that sparks memory of Terrence Mallick if you will. This seems to be Snyders most adult themed film coming out of making visually stunning CGI films. It's somber tone makes it seem as though it wont be a big explosive summer film but a serious film that could join the realm of The Dark Knight Trilogy.
I do have one big problem with it. Zack Snyder. I am still very angry about Sucker Punch which landed on my #2 of my worst of 2011 list. Now you're considering the idea that I am going to hate this movie because I don't like Snyder. Not at all true. I think he has a visually stunning eye(I did like Watchmen but didn't like 300), I just don't think he should write his own films.
There are two versions of the trailer. One with Russell Crowe, the other with Kevin Costner. Here is the Costner version if you're wondering about it(the crowe version is the trailer at the top if you haven't guessed it yet)- http://www.youtube.com/watch?v=c_VRP5q1Zow
The final shot of Superman flying is pretty Spectacular. It shows us the harsh conditions of the mesosphere, stratosphere and troposphere; after leaving the final layer of Earth, he goes supersonic. While the other Superman films make this effect seem simple, Snyders version seems to take the realism to its realistic level(pun not intended).
So overall, if you were expecting to see more of Superman in this trailer, it wont work for you. Otherwise it's a fantastic teaser that left me wanting to see more.