Analysts are predicting a big Presidents' Day weekend at the box office, with three films, each targeting a different demographic group, making their debuts. (Five, if one includes Music and Lyrics and Daddy's Little Girls, which opened on Valentine's Day.) Ghost Rider, based on the Marvel Comics character and starring Nicolas Cage, is expected to take top honors with a gross of around $45 million, analysts said today (Friday). The two other films are likely to earn in the neighborhood of $12-20 million in their debut. They include Bridge to Terabithia, based on the children's book, likely to earn about $20 million, and Breach, a spy drama aimed at older audiences that just screened at the Berlin Film Festival, likely to take in $8-10 million.