Update: Gunn held another QnA where he revealed Guardians of the Galaxy 2 will start filming February 2016 at Pinewood Studios in Atlanta, Georgia.
Gunn has been busy developing the sequel, in which he previously let it be known Marvel thought his latest approach was "risky."
Screen Rant caught the QnA and jotted down the following:
Gunn has submitted his treatment for Guardians of the Galaxy 2 to Marvel brass.
He has a follow-up meeting this Friday about the treatment and will begin the actual screenplay in about a week, in which he later added he is about 70 pages into it.
Gunn confirmed that Ronan is dead and that "not everything is going to happen in the movies as same as the comics."
Gunn said fans will get to know the Guardians in the sequel in a "deeper way."
Guardians of the Galaxy 2 will be in 3D.
Gunn offered they don't do motion-capture work for Rocket and Groot, they just reference images at times.
They may have figured a way for Karen Gillan not to shave her head for Nebula.
Regarding the writing process of both movies, Gunn said he plots out the whole story, and then writes it after.
Other tidbits mentioned include:
Gunn has seen and liked Avengers 2; "lept for joy" about Spider-Man joining Marvel; current favorite comics are Silver Surfer, Wolverines and Secret Avengers; "really dug" the Fantastic Four trailer; would never direct an X-Men movie, and his favorite villain is Heath Ledger's Joker.
"Guardians of the Galaxy 2" has a May 5, 2017 release date.