Kate Winslet's villainous Jeanine is in possession of a mysterious box in the latest Insurgent trailer

By Tara Fowler
Updated December 12, 2014 05:30 PM

The full trailer for Insurgent, the follow-up to March’s blockbuster film Divergent, was released Friday, and fans of Veronica Roth’s book series were surprised to see a mysterious box that featured prominently.

“We found it,” Kate Winslet‘s baddie, the Erudite Jeanine, says. “The future our people deserve.”

The box does not appear in Roth’s best-selling novels. But theories about what’s in it are already flying fast and furious on Twitter.

“What does Jeanine think is in that box, Caleb?” Tris (Shailene Woodley) asks her brother (played by her Fault in Our Stars co-star Ansel Elgort).

“I don’t know, but she’s testing Divergents, searching for the one that can open it,” Caleb answers.

We’ll give you one guess at who’s the most likely candidate.

The trailer raises plenty of other questions as well: Will the rogue Dauntless join forces with the factionless? Will more people die because of Tris? And who wins in a fight – Shailene Woodley or Shailene Woodley?

Insurgent hits theaters March 20.