The final moments of Killer of Killers confirm this when it reveals Naru is in stasis on their world, explaining how they were able to so easily present Raphael's pistol to Torres for his duel.

Predator: Killer of Killers now fills a gap in the Predator timeline and solves a plot hole created in Prey. Prey ends with Naru in possession of Raphael Adolini's pistol.