Invincible co-creator Robert Kirkman revealed that Season 4 will introduce a brand new story not seen in the comics.
Invincible's third season adapted the comics run by Robert Kirkman, Cory Walker, and Ryan Ottley closely, but the post-credits scene of the finale featured a surprising returning character.
This led to the confirmation of a brand new, original story in the coming season.
I wrote the fourth episode.
According to Robert Kirkman, the original story will take place during Season 4's fourth episode, which he directly wrote.
Author's summary: Invincible Season 4 introduces new story.