A poster for Star Wars: The Last Jedi is teasing a pretty big moment ahead of the film’s December debut.

The Japanese ad claims the movie will feature the franchise’s “Most Shocking Truth”—even bigger than the bombs set off by George Lucas in the original trilogy.

As of now, Darth Vader being Luke’s father and Luke and Leia being siblings remain the franchise’s “most shocking” secrets. So, what could the poster possibly be teasing? We’re expecting to learn about Rey’s parents, but how shocking can the reveal be?

There are plenty of outlandish theories that speculate about Rey’s past. Some believe she is the reincarnation of the very first Jedi, while others believe she’s simply Luke’s daughter. The last theory would be too neat and tidy to be shocking, so that’s probably not it.

What if it doesn’t have to do with Rey at all? What if we learn about the identity of Snoke, or perhaps something about Kylo Ren’s past comes to the surface?

Below is the rough translation of the ad:

The Most Shocking Truth In Star Wars History Will Soon Be Revealed! A new generation’s tale of the struggles of light and dark, virtue and evil has begun with the death of Han Solo. In a Galaxy where First Order and the Resistance are fighting against each other in a way, the heroine, Rey, had the Force awaken within her. What will happen to the galaxy when Rey and the only remaining Jedi knight, Luke Skywalker, meet? Kylo Ren has fallen to the Dark Side of the Force and killed his father, Han Solo. As a successor of his grandfather, Darth Vader, and a high ranking enforce in the First Order, where will his ambition lead him to? Furthermore, Kylo Ren’s mother, the leader of the Resistance, Leia, Poe, Finn, and BB-8, will embark on a new mission!

Disney recently released the first trailer for the film, which saw Luke tell Rey that it was time for the Jedi to end. We have some idea why that is, but it’s not exactly shocking, nor does it reveal some big truth.

We’re still months away from the movie’s release, but the hype is already starting to go into overdrive. The poster raises many more questions than it answers and, unfortunately, we won’t know what’s fact and what’s fiction until the movie hits theaters on December 15.