Billy doesn't kill Homelander in the comics. The interactions between them are more nuanced and don't end with Billy being the one to cause Homelander's death.
Butcher manages to kill Homelander through a carefully planned and executed strategy involving a combination of surprise attacks and exploiting Homelander's weaknesses.
Soldier Boy doesn't kill Homelander in the comics. The story is more intricate, with various factors influencing the interactions and fates of these characters.
In fanfiction, Bardock and Omni - Man are often combined in interesting ways. Bardock is from the Dragon Ball universe, known for his sacrifice. Omni - Man from Invincible has his own complex character. In fanfics, they might be pitted against each other in battles of strength. This can lead to exciting scenarios where their different powers and personalities clash. It also allows for exploration of how their respective moral compasses would interact in a fictional crossover.