Vulture caught up with Gunn who teased the sequel will be more about Star-Lord and his father. Star-Lord's father was absent from the first Guardians of the Galaxy movie, but is said to be an alien (though apparently SL's father will be different than the comics).
"There's a lot of stuff I'm excited about in the new movie," Gunn offered. "Listen, I'm still excited about Star-Lord's character and where he goes. At its heart, Guardians is a story about families, and if the first film was about him and his mother, this is a story about fathers. So it's exciting to go there."
As Gunn notes "fathers," perhaps he is also talking about the "fathers" of the other characters as well. Maybe we'll learn more about the Gamora, Nebula and Thanos relationship or even about Drax's origins. It's even possible we could learn more about where Groot came from.
With the first Guardians of the Galaxy movie being such a success, Disney quickly announced a sequel, so it should be no surprise that Gunn mentions the possibility of a third film.
"I knew for a long time what the story of the second one was gonna be," Gunn said, before teasing, "And the third one!"
Update: Gunn offers more in the following video with: "I think it's about getting to know the characters a little bit more... and also get a little bit more - I don't want to say serious - but go a little bit deeper with who the characters are."
Gunn also says we'll get to know more from Gamora, Nebula and Yondu "in a way we got to know some of the characters in the first movie."
Update #2: Gunn offered the follwing on Facebook:
I did five short interviews on the red carpet at the Age of Ultron premiere, and it's all been distilled to three topics: 1) Guardians of the Galaxy 2 is about Fatherhood, 2) We'll get to know Gamora, Nebula, and Yondu more in the sequel, and 3) I think the mix for Awesome Mix Vol. 2 is better than Awesome mix Vol. 1. There. I just saved you ten thousand articles.
PS All of this is subject to change. Although I have a very intense and specific 70 page treatment (or scriptment as it's often called, because it contains dialogue), I am just now diving into the actual script. If inspiration strikes I can, and often do, diverge wildly from my original plan. In a couple weeks, Guardians 2 could center around the love triangle of Awesome Android, Paste Pot Pete, and Taserface, backed by an all-Spice-Girls soundtrack.
"Guardians of the Galaxy 2" has a May 5, 2017 release.