After struggling with original fare in recent years, Pixar is hoping to regain its box office mojo with this weekend’s “ Hoppers .” Disney’s animal-centric adventure is poised to lead in North America with $35 million to $40 million from 4,000 theaters. With enthusiastic reviews and fierce demand for kid-friendly fare, though, box office watchers think the animated comedy could beat expectations. Nina Gold on Her Favorite Casting Moments: From Jacobi Jupe in 'Hamnet' to Adam Driver in 'The