A week before Guardians of the Galaxy opened in theaters, en route to becoming the biggest movie of 2014 so far with over $372 million, writer-director James Gunn signed on to write and direct Guardians of the Galaxy 2. The filmmaker teased new details about the sequel, including the possibility of new characters, during Variety's Entertainment and Technology Summit, where he joked about how the sequel will open.

"It's going to be a really surprising open. What happens is all the characters are killed in the first 10 minutes. In really horribly brutal fashion."

While there isn't a direct quote from James Gunn, the director does tease "fans may see the team adding members."

The writer-director confirmed that all five of the main characters, played by Chris Pratt, Zoe Saldana, Dave Bautista, Bradley Cooper and Vin Diesel, will be back, along with a number of unspecified characters from the first movie and a few new characters as well.

The filmmaker then hinted that the movie will uncover a few secrets that were presented in the first. While he wouldn't go into detail about which secrets will be revealed, it seems likely that fans will learn more about the identity of Peter Quill's real father.

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Here's what he had to say when asked about his writing process for the sequel.

"I spent all day on Aug. 1, the day the first movie was released, writing Guardians. I was so excited about it and I was finally able to let go of the last one and begin the second one. I always saw this as a universe, not just as one story."

He was also asked about the possibility of this Marvel franchise crossing over with another Disney-owned property, Star Wars, since they both take place in galaxies far, far away. Here's what James Gunn had to say about the Guardians of the Galaxy meeting up with Star Wars characters.

"Star Wars was a long time ago. It would have to be time travel."

Fans will be able to pick up this Phase Three adventure on Blu-ray 3D, Blu-ray and DVD December 9, which will included a director's commentary and a number of deleted scenes. The director teased one of these extra scenes is a longer version of the "fake laugh" Rocket Raccoon lets out after Peter Quill reveals how much of a "plan" he has.

"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 that the laugh is fake. It's a pretty fake laugh, and I think Rocket gets hurt that Groot goes against him."

The filmmaker also talked about his passion for making the movie in 3D, which is something he pushed for from the beginning. He revealed that his shots and special effects were planned out in advance for 3D in pre-production, instead of just converting all of the footage to 3D in post-production. He also said that the international appeal of 3D is what drives most studios to push for it.

"3D kind of is a wash in the United States, but in Europe it's bigger. 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."

Are you excited to learn more about these new characters that may pop up in Guardians of the Galaxy 2? Chime in with your thoughts below.