I hardly dare to write this post, to even edge my pinky toe toward the waters of Watchmen analysis, but I will say this: as a newcomer to the story, I was intrigued by the emphasis on energy. At one point, a major character blasts a bunch of smarmy oil execs, telling them humanity "deserves better than what you've given them." (I committed the entire line to memory at the time, but the movie was so damn long good that I forgot it.)
I brought this up in our news meeting today, only to be met with the response of two staffers far more Watchmen-ucated than I, who pointed out that the energy chatter in the movie does not stem from the original book. That makes sense, considering the, er, altered denouement. Which is interesting itself, since the film was otherwise slavishly loyal to the book.