Mishmash of a film. Why Ego had to be downgraded to Kurt Russell's senseless "I must destroy everything for no logical reason" makes no sense and utterly robbed the comic version of its rich history and drive.
It literally adapted his first Thor appearance.
Aliens: Oh, help us Mr God Man! We think this planet is going to eat us!
Thor: But I don't wanna-oh, fine. *Kicks Ego* Yo! What's the deal?
Ego: *Appears as human avatar* Oh yeah, I'm totally gonna send out my antibodies to conquer any planets they find. I'm so glad you rocked up. I need a test subject.
*Thor gets chased and nearly absorbed/eaten/crushed by Antibodies, knocks Ego out by zapping him straight in the brain.*