The Walking Dead co-creator Robert Kirkman has announced a new animated series called Invincible starring Zachary Quinto and Khary Payton.The upcoming Amazon adaptation is based on Kirkman’s comic book series of the same name, which was first published in 2002 and ran for 144 issues.As The Hollywood Reporter confirms, Khary Payton has now joined his fellow Walking Dead actor Steven Yeun in signing up to the project, and will portray the character Black Samson.