Two new I Am Legend trailers are now online. The international trailer features a variety of scenes and the U.S. trailer has a more foreboding feel.

The story follows Robert Neville (Will Smith), who seems to be the last man on Earth. He's immune to a virus that's unstoppable, incurable, and man-made. Since he's a scientist, he tries to find a way to reverse the effects.

Neville sends out radio messages for three years hoping to find survivors and it turns out he is not alone. Mutant victims are lurking in the shadows watching Neville's every move and waiting for him.

Perhaps mankind's last hope, Neville is driven by only one remaining mission: to find a way to reverse the effects of the virus using his own blood. But he is outnumbered and running out of time.

I Am Legend hits theatres December 14, 2007.