Look, i can tell when the Winner of season is in the preview and even though i never ever mentioned it on social media before i knew Wendell was gonna win Ghost Island due to the preview aswell as Nick , sometimes they spoil the winner by showing them on the previews,well i dont blame the editors for that though since these new seasons of survivor have been showing the cast more and more in previews since they film in the same location and the show is about themes now and not about the Locations anymore, i bet you some future season will be AvAvA(Academics vs Athletes vs Artists)
HOWEVER i dont think neither Wendy nor Rick will win Edge of extinction ,they'll probably be main characters or something.