Guardians of the Galaxy is currently the highest grossing movie of 2014 with $328 million domestically and $732.6 million worldwide. A sequel was announced earlier this year following the Marvel movie’s massive opening weekend.

Director James Gunn will return to helm the sequel and spoke at Variety’s Entertainment and Technology Summit about what we can expect.

“It’s going to be a really surprising open. What happens is all the characters are killed in the first 10 minutes in a really horribly brutal fashion,” Gunn joked.

All kidding aside, Gunn confirmed that all five original Guardians will be back, along with unspecified other characters from the first film. Gunn also said that fans may see the team adding new members and that the sequel will uncover some secrets posed in the first film.

“I spent all day on August 1, the day the first movie was released, writing Guardians 2,” Gunn said. “I was so excited about it and I was finally able to let go of the last one and being the second one. I always saw this as a universe, not just as one story.”

Gunn also talked about some extras fans can expect from the upcoming home video release. In addition to a director’s commentary, Gunn said there would be a number of deleted scenes that he said add to the background and context of the characters rather than distracting from or changing the story. He particularly likes a scene where Rocket Raccoon fakes a laugh as Peter Quill’s plan.

“In the long version of the scene where Rocket is laughing at Quill, Quill gets very offended by that and takes a vote of the other Guardians to see who thinks the laugh is fake. It’s a pretty fake laugh, and I think Rocket gets hurt that Groot goes against him,” Gunn said.

Gunn also talked about making the film in 3D, which he said was a decision he pushed for from the beginning of production.

“3D kind of is a wash in the United States, but in Europe, it’s bigger,” he said. “So it makes much more of a difference than it does here. If it was just 3D in the United States, most people would not do 3D.”

Guardians of the Galaxy will arrive on home video December 9. The sequel is currently scheduled for a July 28, 2017.