Pixar’s “ Hoppers ” nabbed $3.2 million in previews, while Warner Bros.’s “ The Bride ” netted a tepid $1 million. Family films have dominated the box office in recent months and “Hoppers,” which has been embraced by critics, is expected to continue the trend. The animal-centric adventure is projected to earn $35 million to $40 million from 4,000 theaters this weekend, which should be enough to capture first place. “Hoppers” cost $150 million to produce. It’s a steep price tag, but the film was