Aside from some brief imagery, the teaser didn't provide an explanation for how the chapters might relate to the story, but it sure did leave fans with a lot of room to speculate. For instance, are the kids going to somehow get stranded in a desert wasteland à la Mad Max? Does "The Pollywog" imply that the monster will be some sort of amphibian? Is it possible that Will's connection to the Upside Down provides him with powers we only thought Eleven had?