I feel like this arc could end on a more positive note, where Marty tosses a good throw, and then end on that reality note where Marty’s success means little in terms of, say, fame and stuff. But it probably will end with a negative end, where Marty tosses a terrible throw and is humiliated, and so is Nate, by that extent.
Don’t tell me this is a job for Ultra-Nate. Please for the love of God.