ZORO VS FUJITORA: This fight was anticipated in Dressrosa, where Fujitora defeated Zoro with relative ease.
MARCO THE PHOENIX VS BLACKBEARD: Marco will fight against Blackbeard, because he wants revenge for Whitebeard and Ace and also thinks that Blackbeard is not worth to have Whitebeard’s devil fruit.
SANJI VS KIZARU: Sanji vs. Kizaru is a pretty expected fight by fans. Both use kick attacks, Sanji exclusively uses them while Kizaru’s strongest attacks are kick attacks. Sanji specializes in Observation Haki, Kizaru is the fastest, to the point where you cannot even react to him. This fight will probably happen near the end of the series, if so, Sanji’s Observation Haki will probably be at it’s peak, probably fast enough to react to Kizaru by then.
MONKEY D. LUFFY VS AKAINU: Luffy’s revenge for Ace’s death. Maybe he will take his revenge with the help of his brother Sabo.
SABO VS AKAINU: Ace fought Akainu for Whitebeard’s honor and eventually sacrificed his life for his little brother- Luffy. Sabo could fight Akainu in order to save Luffy, however, this time he wouldn’t die.
LUFFY AND TRAFALGAR LAW VS KAIDO: Luffy and Law against “The strongest creature among all living things”!
SHANKS VS BLACKBEARD: This fight has been hinted a lot. Those Shanks’ scars, Shanks’ concern about Blackbeard’s rising strength, Blackbeard outright saying at the end of the war it’s not the time for their fight implying there will be one.
MONKEY D. DRAGON VS BLACKBEARD: Blackbeard is currently targeting the Revolutionaries, but can he really defeat the most dangerous and most wanted man in the world?
ZORO VS MIHAWK: This fight has been hyped up since the beginning of the series. Mihawk is the current holder of the title, “Greatest Swordsman in the World”. Because of his status, defeating him is Roronoa Zoro’s ultimate goal.
MONKEY D. LUFFY VS BLACKBEARD: The ultimate fight for the title of “Pirate King”.