It’s not really based on anything, The story for Guardians 2is an original story that I came up with that I started working on actually while I was shooting Guardians 1, and it’ll answer some of the questions that were put forth in the first movie about Peter Quill’s father and who he is and what’s going on with that. We’ll get to know some of the characters a little bit more and then we’re going to meet a couple of new characters who will be very important to Guardians movies and probably important to the Marvel Universe as a whole.
Source: Comicbookmovie.com