I do not own Samurai Jack or the Narutos.
Jack arrived in the land of Iron with Kakashi Hatake, and Might Gai while Naruto trained with someone from lightning country called Killer Bee. Jack saw many shinobi with different insignias on their hitai-ates that symbolized their military status for a certain village.
As he approached the area everyone would be discussing the situation thats been happening for the villages. A man stood and called out Jack, "Who are you sitting where the Hokage should be?! Your not the hokage, and you dont even look like a shinobi from the leaf!" He seemed to yell from across the wide table, Jack had his eyes closed 'Just like the Scotsman in his volume...' he thought, but opened them to see the tall, muscular tan man that was yelling at him.
"Shall we begin this now?" Jack asks, looking at all the kages that have assembled along with their guards. They were wondering why this stranger was sitting with leaders and being so calm, but shrugged it off temporarily for what they came to do at hand.
Time passed by as they discussed and some argued over how the Akatsuki formed because some villages hired them for assistance and accusing some of making that act, or causing the need to happen in the first place at all.
Jack did not speak a single word during the act as he did not know much history of the elemental countries to add an input, but knew that the arguing was not helping anyone in anyway, especially if their fighting some powerful foes like Pein. Giving a sigh, and shook his head before looking at evryone and spoke clearly, "The past lead us to this point. Now, the present is being decided." Jack states simply and lookes to everyone, "What do everyone want to do to stop this threat?" Everyone lookes to him, seeming to be thinking over what he had said.
They decided to join forces against their common foe and to have each high ranking shinobi take charge of a division, and each kage assist in what they could as well. Jack felt better knowing that they decided to help eachother instead of staying at eachother's throats, especially when attacking eachother does nothing.
As the meeting became calm, an individual suddenly appeared in a black cloak with red clouds about, wearing an orange mask announcing the end for all shinobi through an illusion he plans to execute in the upcoming war between Akatsuki and Shinobi.
Jack watched the man carefully, hand on his sword hilt always as words were spilt, but no other actions occurred and the stranger left as quickly as he came. "We need to prepare..." Jack noted, looking at his two trusted leaf comrades that stood by his side if anything were to transpire.
As the shinobi prepared some other things seemed off to Jack, he could hear echoing laughter that could not come from any shinobi within the summit meeting, but was very memorable and impossible to forget the laugh's heavy echo that seemed to haunt him. Jack looked about with frantic eyes, showing some tension from the past handling many of Aku's tricks, but to not see Aku for so long and to have the being come back sets him on edge once again.
Looking around with uncertainty, his eyes searched for the dark towering shapeshifter that released the dark laughter. To find the being would be both a nightmare and dream for Jack for he had allies that could help him take this being down to rid the nightmares pernamently, hopefully. Although a nightmare for he has searched for a way home with and without Aku, and to see the shapeshifter will remind him of the many terrible things he needs to remove just as he had promised, but failed to fullfill yet.
"Ahhh... hahaha..." the laughter came louder and stronger, like the dark being stood above you, "I, the great Aku, have come... hmmm? My, this land is ravaged, I might as well leave and enjoy the show of its own destruction." Aku appeared in a smaller version than his usual towering form, he still had his plain stature shrunk to where he stood at Jack's height, but simply ignored all the other humans that were there, besides for Jack the nervous ssamurai who could not find Aku at the moment.
The whole situation was amusing for Aku, he saw the small human that commenced war on all the shinobi with seeming ease before quickly leaving and causing an uproar of its own. He had a slight understanding about the elemental countries and found their desires trivial, unless they worked in his favor which never seemed to be the case, but to be seen as a Kage or a Daimyo as these humans call them, those two positions hold quite a bit of power to consider taking hold of.
Aku smirked with delight over the chaos created by that one person's declaration, but the joy was short-lived as the internal turmoil grew beyond understanding the anger, but then became quiet by Jack calming the storm of rage that was coming from the shinobi. It only proved to irritate him when Jack removed the anger that actual made Aku joyous for himself, he could say that the feelings of anger, fear and sorrow are what entice and feed him to all powerful.
Aku grimaced for a short bit, but not too long, he never allowed a bad situation to bring him down no matter if it is out of hand or changed with his guidance, he felt that things would adapt into his favor in the end, by waiting out for Samurai to pass away. That plan went out the window quickly, but he was patient and was willing to wait for his mortal enemy to die or pass away in hopefully a dreadful way.
To be honest, I wanted Aku to appear and Tobi/Madara, but doing both may ruin who should get attention more...
I was trying for maybe aloof Aku? Since he is rather chill in the series, more relaxed.