More About the Trailer

As you can notice in the screenshots to the left, there are a few differences between the Super Bowl TV spot (top) and the theatrical trailer (bottom).  The explosions are a bit brighter in the trailer and there are some more spaceships that have been added as well.  Also, one of the buildings in the city has been replicated to have a twin next to it.  I wonder if there is a reason that a twin to that building would be added or if it's just to have another building in the city.  On another note, it seems like this is the first and final theatrical trailer for the movie.  Although, there will be more TV spots and the 3D trailer in May will have a couple of extra scenes.

Source: Transformers Live Action Movie Blog