Spoilers for “Invincible” (both the TV show and the comics) to follow.
The whole premise of “Invincible” is a kid trying to live up to his dad — only his dad is the world’s greatest superhero. The story soon reveals Nolan Grayson aka Omni-Man (J.K Simmons) isn’t all he appears to be, but from the start Mark Grayson aka Invincible (Steven Yeun) has been from a family of heroes. Over the series, that family grows. As of season 3, Mark’s kid half-brother Oliver (Christian…