Warning: Contains SPOILERS for Invincible season 4!The latest chapter in Mark Grayson's story has concluded, with Invincible season 4 ending the Viltrumite War, but the path it takes to get here included several major changes to the comics. Prime Video's acclaimed animated series has comic creator Robert Kirkman serving as co-showrunner. He's been quite open about improving the story and characters whenever he feels it is necessary.