Here’s how I envision it: during the season finale, Jeff shows up at the resort and looks into the camera and says “[Character] is the one who dies.”
Edit: apparently the flair doesn’t make it clear, this is a joke. See also r/survivorcirclejerk post (survivor 50 finale spoilers)
Here’s how I envision it: At the end of the series finale, there’s a mid-credits scene, fourth wall breaking, where Jeff Probst and Mike White show up. It turns into a Survivor episode with all the White Lotus cast at a final tribal council, and Jeff reads out the votes for a winner. They’re all for Mike White and Jeff crowns him the sole survivor. Then, in a post-credits scene, we see Mike White waking up in bed. “No!!!! It was all a dream!!” BUT the final twist is that Jeff Probst is sleeping in bed next to him.