At his trailer in Australia, Jack was attacked by Sauron, who is now an agent of the new Weapon X program. After their encounter, Sauron offered Jack to join Weapon X. Thinking that Weapon X was a superhero team and they could fix his mutant side effect, Jack accepted. After getting some money at the Bank of Australia and saying good-bye to his girlfriend and dog, Jack left with Sauron to join Weapon X. Along the way Jack made a joke about Sauron and the Director. This enraged Sauron and he literally tore Jack apart. Though he was in pieces, Jack survived. Sauron put Jack in a box, and brought him to the Weapon X compound. There, Jack used his telepathy and discovered the Director's plans for him.
Jack is currently being utilized by the Weapon X program as a mind-reader during the admissions process for captured mutants incarcerated in the "Neverland" concentration camp. It is unknown if Jack-in-the-Box kept or lost his mutant powers after the M-Day.