Kakuzu might be an unexpected choice. His focus on money and practicality could lead the Akatsuki in a more resource - focused direction in the new world. He would ensure they have the necessary funds and materials to survive and thrive in this different setting.
Pain would still be a likely candidate. His Rinnegan gives him a powerful and commanding presence. He has the ability to see the big picture and make strategic decisions for the group.
Itachi could also be a strong contender. His intelligence and self - sacrifice nature could make him a respected leader. He is well - versed in the ways of the Akatsuki and could lead them in a more diplomatic way in the new world.
Itachi. He has his own moral code and he might see something in Chibi Sakura that reminds him of his own will to protect. He could form an alliance with her if he believes it would be for the greater good, like stopping the more extreme members of Akatsuki from causing too much destruction.
Itachi. He's one of the more complex and morally gray members of the Akatsuki. If he saw that the female OC was in a situation that could potentially cause chaos or harm to the ninja world in a larger sense, he might initiate the rescue. He's also the type who might see some value in the OC that others don't.
Itachi could be a likely candidate. He has always had a complex relationship with Naruto. He knows Naruto's potential and his importance in Sasuke's life. Itachi might see Naruto as a key to changing the Akatsuki from within. He could approach Naruto with his calm and mysterious demeanor, explaining to him the real goals of the Akatsuki that are hidden beneath their violent exterior.
Itachi and Kisame could be a pair with a close bond. Itachi is a very reserved person, but Kisame seems to respect and understand him to some extent. They often work together on missions, and this could be seen as a form of 'family' bond within the Akatsuki. Another possibility is Deidara and Sasori. Despite their differences in art forms, they seem to have a connection. Deidara looks up to Sasori in some ways, like a younger brother might look up to an older one.
Definitely Itachi. He has a complex character and his own sense of justice. He might see Naruto as a key to changing the shinobi world in a different way than what the Akatsuki originally planned. Another one could be Kisame. He is loyal to Itachi and would likely follow Itachi's lead in taking care of Naruto.
Pein could be another one. As the leader of the Akatsuki, he might see baby Naruto as a means to an end. He could either want to use Naruto for his own grand plans or, in a more interesting twist, be swayed by Naruto's innocence and change his perspective on the Akatsuki's goals.
Sakura and Sasuke are very likely allies. Sakura has her medical skills and combat abilities, and Sasuke, despite his past issues, has great power. They've been comrades with Naruto for a long time.
I think Hidan would be the most difficult. He was always so hot - headed as an adult. As a baby, he would probably be very fussy and hard to calm down. He might throw tantrums all the time and not listen to whoever is taking care of him.
If Naruto becomes the leader of Akatsuki in fanfiction, he might try to change the Akatsuki's goals. Instead of causing chaos and destruction, he could lead them towards a more positive path, like using their power to protect the villages rather than attacking them.
If Naruto became the leader of the Akatsuki in fanfiction, it would completely change the dynamics of the organization. He might try to reform it from the inside. Instead of the Akatsuki's original goals of chaos and destruction, Naruto could steer them towards more positive ends, like using their power to protect the weak or broker peace between the ninja villages.