So back in chapter 811, after Luffy and Co. learn what happened to Zou from Duke Inuarashi, he makes the proclamation that one day he's going to "whup him".
Many people wonder when and how that was going to happen since Luffy had seemingly been setup to fight Kaido in a 1 v 1 one the roof. That has all changed now that Luffy has been thrown off the Island, and Kaido is now downstairs in Onigashima running rampant. One thing we do know though, is Luffy is not going to stay out of the fight for too long, and is going to make his way back up there eventually.
Right now Duke Inuarashi is currently fighting Jack on his own. We already know that even at 100 percent strength, Duke is not strong enough to take Jack down, and with both of them being injured, it stands to reason that Jack still holds the advantage over Duke. There is no way Duke can defeat Jack on his own, but at the moment, there is no one who can join him in this fight.
When Luffy does enter back into the fight, he's going to have to go back in the same hole Big Mom created. Duke and Jack are fighting somewhere in the general vicinity. I'm predicting that when Luffy makes it back to Onigashima, he'll come across Duke and Jack fighting. Duke might even be on the cusp of losing his life, and Luffy will make his dramatic re-entrance to the battlefield by taking out Jack, and saving Duke.
It's a pretty nice touch the way Oda set this up with Duke being the one to tell Luffy about Jack, which is what pissed Luffy off, and now Oda has setup Duke fighting Jack on his own.
What do you guys think, will Luffy save Duke and deliver on his word about how he was going to beat him, or is someone else going to step in to assist Duke?

Many people wonder when and how that was going to happen since Luffy had seemingly been setup to fight Kaido in a 1 v 1 one the roof. That has all changed now that Luffy has been thrown off the Island, and Kaido is now downstairs in Onigashima running rampant. One thing we do know though, is Luffy is not going to stay out of the fight for too long, and is going to make his way back up there eventually.
Right now Duke Inuarashi is currently fighting Jack on his own. We already know that even at 100 percent strength, Duke is not strong enough to take Jack down, and with both of them being injured, it stands to reason that Jack still holds the advantage over Duke. There is no way Duke can defeat Jack on his own, but at the moment, there is no one who can join him in this fight.
When Luffy does enter back into the fight, he's going to have to go back in the same hole Big Mom created. Duke and Jack are fighting somewhere in the general vicinity. I'm predicting that when Luffy makes it back to Onigashima, he'll come across Duke and Jack fighting. Duke might even be on the cusp of losing his life, and Luffy will make his dramatic re-entrance to the battlefield by taking out Jack, and saving Duke.
It's a pretty nice touch the way Oda set this up with Duke being the one to tell Luffy about Jack, which is what pissed Luffy off, and now Oda has setup Duke fighting Jack on his own.
What do you guys think, will Luffy save Duke and deliver on his word about how he was going to beat him, or is someone else going to step in to assist Duke?