So the trend of having trailers for trailers shows no signs of going away. After having short trailers for both Prometheus and Iron Man 3 before seeing the real deal, Superman; Man of Steel seems to be following in a similar fashion.
This time around, instead of “liking” the Facebook page as with Iron Man 3 or just simply being patient as with Prometheus, the new trailer for Superman will go live if you pre-order a copy of The Dark Knight Rises from Best Buy.
This seems to me like a slightly convoluted way of getting people excited for the new trailer, as Best Buy is an American retail chain and Zack Snyder the director of the new Superman film has said the new trailer will be shipped with the copies of The Hobbit when it arrives at cinemas anyway.
You can read the original story here http://screencrush.com/man-of-steel-trailer-teaser/