Guardians of the Galaxy

The Guardians of the Galaxy show up in Season 2 Episode 6 "Michael Korvac". The team is lead by Star-Lord (Peter Quill), and consists of Rocket Raccoon, Adam Warlock, Quasar (Phyla-Vel, Captain Marvel's daughter), and Groot.

Origin
In the 31st Century, the Guardians of the Galaxy are freedom fighters formed by a diverse group of beings. The home reality of the Guardians of the Galaxy has been designated Earth-691. The founding members are Vance Astro (later Major Victory), Charlie-27, Yondu and Martinex. The team was founded to fight the Badoon race, who had conquered the Sol system and the Alpha Centauri system among others. The Guardians became the leading force of the resistance movement against the Badoon.

Members
Major Victory

Charlie-27

Yondu

Martinex