The children of Gatlin are inducted into a cult for the entity known as "He Who Walks Behind the Rows." It starts with a single child (Isaac in the original film, the young girl in this remake) coming into contact with him and being persuaded to help him after doing something for the child. This leads the main child to induct the other children of Gatlin into a cult worshipping this mysterious entity that craves violence. It would have been easy to lean away from this angle in the remake. Plenty of things can influence children to do horrible things.
That said, "He Who Walks" can be seen scrawled in blood on some of the walls in the town. This is the shortened version of the entity's name, making it easier to address him verbally and through writing. The end of the trailer also features a glimpse at something mysterious and otherworldly.
At the end of the trailer, a girl can be seen strung up in the cornfield. She's one of the older cast members, meaning she's likely a teenager on the brink of becoming an adult or has just crossed over the border of being considered one. As she hangs there, terrified, a snarling, growling, and guttural noise can be heard behind her. A man screams, followed by horrible noises of him being attacked and likely ripped apart.
The trailer wants us to believe that this is He Who Walks.
