Not related. According to a check of the official Hedgehog Cat website, the Starcore Hunters are an organization in Wipeout: Star Dome Railroad, with members Kafka, Silverwolf, and Blade, while the Antimatter Legion is an overhead faction that debuted in Wipeout: Star Dome Railroad and its spin-offs. The Antimatter Legion is a character in the Crash: Star Dome Railroad scenario descriptions to guide the plot, and the two sides are not directly related in Crash: Star Dome Railroad.