Luffy and Trunks appear inside the time machine.
Luffy said: "What are you saying?! Are we going to Ace's execution?!"
Trunks: "Yes, this is the time when the two people we came for will appear. Here in this place."
Luffy: "But... Ace's execution happened a long time ago..."
Trunks: "That's not a problem. I went to that time before coming to get you from this time... The place was calm there, but the person who asked me to bring you said that a major war will happen soon in that time... I don't know what your connection is to that young man whose name I don't even know, or why he chose you specifically... But anyway, your presence will help us identify people from your universe so we don't mistakenly kill innocent people from this universe... Because we don't know how the ones we came for look... All we know is that they have Ki energy..."
The glass cover of the time machine began to close.
Trunks: "Alright... We're going now."
The time machine flew up and disappeared with Trunks and Luffy inside. After a few moments, the time machine appeared again in the same place above the Gate of Justice. It landed on the gate, and its glass cover began to open.
Trunks said while looking outside: "I think this is the time we want."
But Luffy exited, feeling dizzy and saying: "I feel dizzy..."
Trunks: "I told you not to look outside..."
Luffy started to regain his balance and looked outside. He was shocked by what he saw. The Marineford Island was surrounded by a frozen tsunami, and there was a fierce battle between the Marines and Whitebeard Pirates.
Luffy said in shock: "This... this...!"
Trunks jumped out of the time machine and said: "It seems the great war has already begun... Wait, what?!"
Trunks started looking around frantically, saying: "Why aren't they here?! Did I mess up the time and create a new timeline?!"
But he felt Ki energy, so he looked toward Marineford Island and said: "No... I feel strange energy like Ki there... It seems they went there without us..."
Luffy appeared, walking slowly over the Gate of Justice, passing Trunks as he looked at Marineford.
Luffy said with a broken voice: "Ace... Is he really there? Is Ace in that place again..."
Trunks: "We have to go there too, Luffy-san..."
Trunks transformed the time machine back into a capsule and flew with Luffy toward Marineford Island.
At Marineford, during the battle between the Marines and the Whitebeard Pirates, one of the Marine ships suddenly fell from the sky onto a spot of water in the middle of the frozen land.
A pirate said: "What is this?! It's one of the Marine ships..."
Another pirate: "But why did it fall from the sky?!"
A Marine soldier screamed while looking at the ship: "Look! There's someone on the ship...!"
Luffy appeared, having come from the future along with Trunks, walking slowly toward the front of the ship.
The soldier: "Impossible..! It's..."
Before the soldier could finish his sentence, Luffy released a very powerful Haoshoku Haki, knocking down a large number of Marines on the frozen land. The power of Luffy's Haoshoku made everyone stare at him in shock.
The Marines who were far from Luffy, stunned, said: "What is this?! What happened to you all?!"
Sengoku: "Impossible!!"
Kizaru: "Oh... I didn't know he had such power..."
Marine soldiers: "Stay calm, everyone! He took down a large number of our soldiers in seconds!"
While Marco looked at Luffy and said with a smile: "No one from our men got hurt... So this is Ace's brother..."
Ace looked at Luffy in great shock and tried to say: "L... L..."
Suddenly, Luffy shouted at the top of his lungs: "Aaaaace! This time, I will definitely save you!!"
Sengoku turned to Garp, who was sitting next to him, and screamed angrily: "Garp! Another member of your cursed family!"
Garp said with great annoyance: "Luffy!!"
Doflamingo: "So, this is the troublemaker... Monkey D. Luffy!"
Trunks appeared, flying above Marineford after dropping Luffy earlier. He thought to himself: "What was that thing he did? He released energy that was very similar to Ki... The energy in this universe is very close to our Ki... It's good that I brought him from a different time..."
Luffy appeared on the ship, behind him a group of prisoners, including Jinbe, Crocodile, Ivankov, and Buggy, all in shock.
Crocodile: "Haoshoku...!"
Jinbe: "Luffy-kun..."
Ivankov: "That was amazing, Straw Hat boy!"
Buggy: "Oi oi oi! That Haoshoku was terrifying! How did you..."
But before Buggy could finish his sentence, Luffy jumped from the ship to the frozen ground.
One of the soldiers screamed at the top of his lungs: "Watch out!! Straw Hat... He started moving!"
Quickly, Sengoku began speaking into the Den Den Mushi, addressing all the soldiers: "Don't let that boy get close! Take him down quickly! He's not just a beginner pirate... That boy is... the son of the revolutionary Dragon!"
The soldiers: "What?! Son of Dragon?! He's a very dangerous pirate then!"
As Luffy continued to advance toward the execution platform...
Whitebeard smiled and said: "Son of Dragon... and son of Roger... What a duo..."
Quickly, Marco, who was flying in the sky, landed on the ship next to Whitebeard and said: "Oyaji, I have important news..."
Whitebeard: "What is it?"
Marco: "I heard that they're going to execute Ace earlier than planned..."
Whitebeard: "I see... That bastard Sengoku..."
Marco: "What should we do? Should I move forward?"
Whitebeard: "No, wait... Sengoku wouldn't let such information slip easily... I think this is part of his plan..."
Meanwhile, deadly battles continued between the pirates and the Marines.
The pirates: "Let's take them down!"
Marine soldiers: "Keep firing at them and fall back slowly... It's time to execute the plan..."
Skoard, waving his weapon, said: "They're retreating... This is our chance to move forward!"
But before Skoard could move, he got a call on the Den Den Mushi: "Brrrbrbrbrbr... brrbrbrbrbr (Den Den Mushi sound)"
Skoard: "Huh?"
Den Den Mushi: "This is Whitebeard."
Skoard: "Oh, Oyaji... What's going on?"
Whitebeard: "Listen carefully, Skoard... I want you to lead the pirates and destroy the Marine ships coming toward you..."
Skoard: "What? Alright, Oyaji. We'll do it. Count on us!"
Meanwhile, Luffy was attacking a large group of zombies from Moria.
Luffy: "Gomu Gomu no... Machine Gun!!"
With great speed, Luffy took down a large number of zombies.
Moria, in anger, said: "Straw Hat, you bastard!! How dare you show your face to me again! Take him down, zombie army!"
But quickly, Luffy disappeared and appeared in the air right in front of Moria's face.
Luffy, arming his hand with Haki, said in anger: "Moria!!"
Moria, in extreme shock, said: "Huh?!"
Luffy threw a powerful punch to Moria's face, shouting: "Don't get in... my way!!"
Moria flew from the force of Luffy's punch and crashed into a Marineford wall with immense destruction.
Marine soldiers, in shock, exclaimed: "He took down a Shichibukai... with one punch!!"
Fear spread among the Marines as Luffy continued to advance toward them.
One soldier said: "He's so strong!! There's no way I can stand against him for even a few seconds...! I'm going to fight another pirate, not Straw Hat!!"
Another soldier: "Me too!!"
Many soldiers started to move out of the way as Luffy approached, but two Marines wearing the Marine uniform did not move. The soldiers who fled in fear from Luffy passed by these two people.
One soldier, while running away, said: "Straw Hat is a very dangerous pirate!!"
The first person, wearing a Marine uniform, said: "Did you hear that? They say he's dangerous..."
The second person: "I don't care about any of that...!"
Then, the faces of the two Marines wearing the Marine uniform appeared, the first being Goku, and the second being Vegeta.
Goku said enthusiastically: "Come on, Vegeta... Fighting people from other universes is so much fun."
Vegeta: "What are you trying to say?!"
Goku: "Isn't it obvious? This kid has energy very similar to Ki... So I'm going to fight him! Maybe he's the one we came to eliminate."
Luffy advancing while Goku and Vegeta stand before him, both wearing Marine uniforms.