'Boardwalk Empire' Season Two Trailer is Mighty Mysterious

The trailer for season two of "Boardwalk Empire" is out, and it asks more questions than it answers.

In the promo, Steve Buscemi's corrupt politician Nucky Thompson walks down the boardwalk, surrounded by an increasingly aggressive mob of people shouting his name. As he walks, he meets eyes with various characters from the show and exchanges meaningful glances or fearful looks.

By the time Nucky reaches the end of the boardwalk, he closes his eyes and the crowd disappears...but a single voice behind him whispers his name, and he turns around as we crash zoom in on his face.

The whole thing seems to foreshadow a good deal of danger for Buscemi's character in the upcoming season. Who do you think the whisperer at the end is? Leave your theories in the comments!