Sometimes a comic book movie can simply be a fun adventure, and the latest DC Universe installment, David F. Sandberg’s Shazam! Fury of the Gods (B) is just that, a rollicking escape. The funny Zachary Levi leads a Philadelphia posse of scrappy superheroes harboring a collective secret: They are actually teenage foster children who can transform into caped crusaders in a snap. The story doesn’t really plumb the full depth of the family trauma and psychological implications inherent in the premise. but it plunges head-first into a mythological action barnburner with the teens fighting titans. The moviemakers disguise their earnestness with wry, throwaway humor especially via teen actor Jack Dylan Grazer, but they squander some chances to dial up the camp value of Helen Mirren and Lucy Liu as daughters of Atlas. There are long passages with pretty elaborate special effects, evocative of the original Ghostbusters with mixes of laughs and thrills packed into showdowns on expansive streets. Opportunities about to root for the underdogs. The film is largely family friendly and keeps enough plates spinning to nourish viewers for its duration.