As for what fans will see, Snyder says...
"I just saw the final version of it this morning... it's a little bit more story, a teeny bit more like a full trailer. This is much more like 'someone's picking off costume heroes'. You'll get a sense of the characters plight you know, 'we were supposed to make the world a better place... what happened to the American Dream'."
Some elements have had to be changed for the trailer, most notably Dr. Manhattan's exposed blue tallywhacker was blurred to be granted approval by the MPAA. He also confirms a third trailer will hit screens early in the new year.