Short version: Hansel and Gretel, written and directed by either Guillermo del Toro, Tim Burton, or [insert director with similar aesthetics as those two].
Hansel and Gretel, but make one of them the stepmother’s child, which makes them step-siblings. There will be many reasons why you’re lost in the woods, some of them include: a widespread famine, running away from an abusive home, treasure hunting, homesickness, searching for a missing person, escaping from an unwanted marriage, elopement, a terrible sense of direction, among other things. Replace the gingerbread house with a town, and the seemingly nice witch with a dark secret with seemingly nice residents with dark secrets. Trails that lead back home will still be featured though, being made of breadcrumbs not guaranteed. Happy endings also not guaranteed.
Fractured fairy tale retellings need more love…