The hottest box office battle of the year heats up this weekend as Paramount's "Interstellar" and Disney's "Big Hero 6" jockey for moviegoers in theaters everywhere. Expect a record-breaking weekend as both films are already on track to surpass $50 million. "Interstellar," with its weekday platform release on 70mm and 35mm and Imax already underway, may have the edge, earning a possible five-day total of $69 million including a $62 million total for the three-day weekend proper.