Like many other M. Night Shyamalan fans, I haven't gotten too excited for any of his latest projects. But something in the trailer for The Visit did make me a little hopeful-check out the part at 2:18
(Blogger is being weird and not embedding the trailer right so here's the link)
From CinemaBlend, where Brent McKnight calls it possibly Shyamalan's "weirdest movie yet":
"This does, however, have elements reminiscent of a modern day fairy tale—that scene of the grandmother asking the young girl to get in the oven is straight out of Hansel and Gretel, all she needs is a house made of sweet treats. That part is definitely right up Shyamalan’s alley, and gives this the potential to be a kind of synthesis of the no-frills horror of Blumhouse and Shyamalan’s sense of magical realism."
You can read the basic plot on wikipedia if you don't mind spoilers. Sadly, it doesn't seem to have too many fairy tale connections other than the mention of the oven, and the fact that it's a brother and sister in a creepy house. But Rule #2 below seems suspiciously witchy...maybe there are other little details hidden throughout the film?