W hen Twilight premiered in 2008, it was a cultural phenomenon. Fans camped outside theaters for midnight screenings, books flew off shelves, and Bella, Edward, and Jacob became household names.

We reported the Twilight news last April, when The A.V. Club and the world’s population of Twi-hards responded with a resounding, “Why?” The film series, which wrapped in 2012, isn’t ...