I Am Legend - Official Movie Trailer

Will Smith in I am Legend is the sort of hero seen fighting for his and other lives in most horror films, which is essential to the genre. Another aspect of this trailer is the voice over. It goes into alot of detail to what happened to leave the worlds population destroyed. Im yet to deicide if i would like to do a voice over, as it adds many good parts to a trailer and also allows the storyline to be set up