One idea could be that Madara kidnaps Naruto to use him as a bargaining chip against the Hidden Leaf Village. He might want to force the village to give up certain secrets or strategic locations. Maybe he believes Naruto's unique power can be harnessed for his own evil plans.
The Hidden Leaf Village would surely launch a rescue mission. They would send their best ninjas, like Sasuke, Kakashi, etc. This could lead to intense battles between Madara's forces and the Leaf Village ninjas. It would be a great opportunity to show off different ninja techniques and strategies.
Perhaps in the fanfiction, Madara kidnaps Sakura because he realizes her potential as a medic - nin. He wants her to heal his old wounds or maybe study her unique healing abilities to find a way to make himself invincible. He could keep her in a hidden lair and force her to perform medical experiments on him.
Sasuke would be furious. He has a deep connection with Naruto, and he would immediately start looking for Naruto. He might go on a solo mission to find and rescue Naruto, using all his skills and powers. Sasuke would not rest until he got Naruto back safe.
Naruto would be extremely enraged. He would vow to rescue Sakura no matter what. He would immediately start gathering his friends and form a rescue team. Sasuke, on the other hand, might initially seem more reserved but would also be determined to get Sakura back. He would use his Sharingan skills to track Madara.
Perhaps Madara has some ulterior motives for kidnapping Hinata. He might want to use her as a bargaining chip against the Hidden Leaf Village. Or he could be interested in her unique abilities. In that case, the Hidden Leaf would have to decide whether to meet Madara's demands or try to outwit him to get Hinata back safely.
The Leaf Village would be in chaos at first. Hinata is an important member of the Hyuga clan, and her kidnapping would not be taken lightly. The Hokage would immediately call for an emergency meeting. They would start by sending out search teams, likely led by some of their best shinobi like Kakashi or Shikamaru, who are known for their intelligence and combat skills.
Madara could also save Naruto by using his knowledge of the ninja world. Maybe he has some inside information about a plot against Naruto and he intervenes in time to stop it. He might have discovered a secret plan by an enemy group and takes action to keep Naruto out of harm's way. This could involve manipulating events behind the scenes or directly confronting the threat.
Yes, there might be such a fanfiction out there. The Naruto fandom is vast and creative, and fans often come up with unique and unexpected family relationships in their fan - created stories.
Some fanfictions might depict Naruto as having a deeper understanding of the chakra system than ever before. He could have found a way to disrupt Madara's connection to the chakra source, or maybe he was able to use his own chakra in a way that nullified Madara's powerful jutsus. Also, Naruto's experience from all his previous battles might have led him to anticipate Madara's moves and strategies, allowing him to stay one step ahead and ultimately defeat him.