VIDEO : 'The Walking Dead' Season 9 Features Carl Grimes Easter Egg

A new trailer for The Walking Dead's upcoming ninth season features a heartbreaking detail referencing Carl Grimes. Carl was killed in the show's eight season but his memory and legacy will continue to impact the show. In fact, it is the memory of Carl which has Rick driven to create a thriving new world in his honor. To maintain his memory and presence in Alexandria, Rick has taken the piece of his porch on which Carl stamped his hand print with Judith's in blue paint (as seen in the Mid-Season Eight finale).