There's a certain kind of writer/director who sees a premise like "anal slugs from outer space" and decides that, regardless of the source material, the concept can only ever be played for laughs and plants their tongue in their cheek during the adaptive process. Lawrence Kasdan is no such auteur.
Lawrence Kasdan is an entirely separate breed, one who sees said premise and thinks they can weave it into a masterpiece. Not just faithful, but emotional. The audience will see…