[6] Shane Acker’s computer-animated post-apocalyptic fantasy is visually interesting, but the characters are bland and the story is wobbly. The movie is a tonal quagmire, trying to balance its dark and dreary subject matter with a kid-friendly PG-13 rating. The plot starts off unimpressively, presenting the aftermath of a future conflict between humans and machines, and surprise, surprise — we lost. The more interesting concept …