An explicit Chekhov setup voiced by the protagonist side: the two feuding rivals’ one-time tactical alliance is teased as the chapter’s last beat and pays off immediately in the next chapter with their match-turning combo (Zoro hurling Sanji as a projectile to score). Low-stakes / arc-local, but a clean instance of dialogue-from-the-cast setting up the very next beat — and a Davy-Back-Fight installment of the recurring Zoro/Sanji forced-cooperation-despite-rivalry grammar (cf. Zoro Sanji Hunt Contest Rivalry Origin).