A new generation of Marvel heroes battle against an ever-spreading zombie scourge in a brand new, horror-infused series for mature audiences only. A new generation of Marvel heroes battle against an ever-spreading zombie scourge in a brand new, horror-infused series for mature audiences only. A new generation of Marvel heroes battle against an ever-spreading zombie scourge in a brand new, horror-infused series for mature audiences only. A new generation of Marvel heroes battle against an ever-spreading zombie scourge in a brand new, horror-infused series for mature audiences only. "Marvel Zombies" is the first Marvel Studios animated series to receive a TV-MA rating.