Four films will be opening wide at the box office this weekend, and although they include a $115-million dystopian epic featuring Matt Damon and a new digitally animated feature from Disney, none of the four is expected to shine. Likely to lead the pack, say analysts, is the Matt Damon flick, Elysium, which should earn around $30-35 million. The Disney feature, Planes, which had originally been planned as a direct-to-video item, may wind up with about $25-30 million, although, with a glut of family films in theaters, even that amount may be optimistic, some pundits argue. Two other films that opened on Wednesday, the R-rated comedy We're the Millers and the sci-fi sequel Percy Jackson: Sea of Monsters could each wind up with around $30 million if the extra two days are taken into account. Each of the films is receiving lukewarm reviews.