[email protected] panel on Friday.Lauren Cohan, Chad Coleman, Michael Cudlitz, Lennie James, Ross Marquand and Sonequa Martin-Green will reunite with fellow “TWD” alum Steven Yeun on the eight-episode Amazon series, which is based on Kirkman’s comic series of the same name.Yeun will play 17-year-old Mark Grayson, who’s just like every other guy his age — except that his father is the most powerful superhero on the planet, Omni-Man.