Should a superhero movie be goofy or serious? A messy CGI canine offers the response: Can’t it be both? Photo: Warner Bros./Everett Collection Here’s a question: Are superheroes fundamentally silly? A hardcore coalition maintains that costumed vigilantes are tragic symbols of mature philosophies, and that Batman should only be sad and drive a colorless tank. But absurdity is the genre’s default setting — bright underwear, statue-steroid muscles, glam masks. The first scene of the new Superman