Kirkman knows the source of the outbreak, but he'll never tell: "I'll never reveal what the source of the outbreak is in the comic," he said. "I'm never going to do that. I know what caused it." (Note: He did say he would tell the readers how after the comic series ended though, but he has no intention to do it in the comic story itself.) On the inspiration of the Whisperers: "I always wanted to show how different people have survived. These people are so beaten down by the zombie apocalypse they they have tried to abandon all humanity. They see themselves as animals and try to embrace that." On Rick and Negan's relationship: Negan has gone out of his way to prove he's not against him anymore. He had a chance to escape and didn't. And then he did escape and proved it was for a worthy cause: cutting off someone's head. " Apparently Negan was supposed to die at the end of the Something to Fear arc: “Negan was supposed to die at the end of the [‘Something to Fear’] arc. He was only supposed to be in the book for four or five issues [but I thought,] ‘I loved this guy too much. [His story] was supposed to end when Maggie takes over the Hilltop. Rick was going to deliver Negan’s head in a box to Maggie.” Source of quotes: Polygon and ScreenRant Kirkman really isn't afraid to let everyone know Negan is his fave.