In a future city where women are bought and sold, the last married man on Earth takes on the city?s annual, gladiatorial game to win the ultimate grand prize: his wife.

Getting really close with this, I feel. A few minor notes. First, by saying “in a future city where”, it suggests that the rest of the world isn’t trading in women. Just the city. Thus, to escape this terrible environment, all he has to do is move a few miles away. I think what you mean is, “In a future where women are bought and sold”. Also, I feel like the phrase “last married man on Earth” does little to add to our intrigue in the character. Here’s the hook: a man fighting in a gladiatorial game to win his wife back. I don’t think that is elevated by him being the last married man on earth. Final note, you don’t need the comma between annual and gladiatorial. Annual describes “gladiatorial games” rather than just games.

Therefore, my final suggested logline would be: “In a future where women are bought and sold, a desperate man takes on his city’s annual gladiatorial game to win the ultimate prize: his wife.”

Good work and good luck.