He obviously had a clear path for the story he was hoping to tell in three movies, so Vol. 3 definitely needs at least his script in order to do the project justice, and come through for the fandom.
These comments are a relief to most Marvel fans, who have been worried about the precarious future of the Guardians franchise since James Gunn was canned back in July.
Out of all the MCU franchises, Guardians of the Galaxy is arguably the most director-driven, as Gunn’s sense of humor, taste in music, and dance moves were all incorporated into the first two films.