The second Guardians of the Galaxy started off right where the first movie left off. There was still the mix of music, comedy and action. This volume focused upon family. First there was the relationship between Quill (Chris Pratt) and his newly discovered father Ego with a brilliant casting choice of Kurt Russell, and then the ties between Quill and Yondu (Michael Rooker) who raised him. Secondary to that was the sibling rivalry between Gamora (Zoe Saldana) and Nebula (Karen Gillan). Finally, there was the idea that the Guardians were a family.
The start showed the audience that Volume 2 was going to be just like volume 1. Rocket is making fun of Drax, a giant beast shows up, music starts blasting and Groot dances away while chasing after small little insects and rodents. He you have the comedy the action and the characters.
The movie then sets up a comparison between the two father figures. Ego saves the Guardians from destruction by a group called the Sovereign. He then announces himself to the surprise of Quill. On the other hand, Yondu is rejected by his group the Ravagers because he was smuggling kids for Ego. That in fact, was how he found Quill. Hence, one (Ego) is perceived as a hero, and the other (Yandu) is a criminal. The story will then reveal whether these were true characterizations or not.
In the end, the movie resolves these stories on a rather heart warming note.