One possibility is that Naruto's fall is interrupted by some sort of time - space distortion. He is then transported to a different dimension where he is raised by an advanced civilization. They see his potential and train him in ways that are far different from the ninja world. This could make him return to the Naruto universe later with extremely powerful and strange abilities.
A hermit who lives in seclusion near the chasm might save him. This hermit could be an ex - ninja who has given up on the world but still has a kind heart. He would then take Naruto in and start training him in his own unorthodox ways, which could include using the natural elements of the chasm area in combat.
If Orochimaru kidnaps baby Naruto in fanfiction, it would likely start a race against time for the Hidden Leaf Village to get him back. The village elders and the Third Hokage in particular would be desperate to rescue Naruto. They might send out their best ninjas, including Kakashi, to track Orochimaru down. Orochimaru, on the other hand, could be planning to raise Naruto as his own weapon, brainwashing him from a young age to be loyal only to him.
Well, in such a fanfiction, Naruto would probably be really cute as a baby. His friends might be super confused at first. Sasuke might be a bit less brooding towards baby Naruto. And Iruka-sensei would probably take on a more parental role, making sure baby Naruto is safe and cared for.
Well, he would have a second chance at life. Since he was a baby, he could grow up with different relationships. He might form stronger bonds with his parents and be able to learn more about his family. Also, he could start training earlier and become an even more powerful ninja. With his knowledge from the future, he could also help the village in new ways, like coming up with better strategies against enemies.
In a fanfic where Naruto meets Kurama as a baby, Kurama might initially be shocked. He could be less hostile than in the original story. Maybe he'd see Naruto's innocence and be a bit more curious. Naruto, being a baby, wouldn't understand the danger of Kurama at all. He might just reach out or giggle at the big fox.
In this fanfiction, it could be that Hinata's memories are still somewhat intact even as a baby. So she might still show signs of her shyness towards Naruto. She could blush when Naruto gets close to her while taking care of her. And perhaps, this situation could lead to Naruto realizing his deeper feelings for Hinata in a more protective and caring way. He would start to see her in a different light and understand how important she is to him on a whole new level.
Well, in the fanfiction world, if Snape turns into a baby, it could be really chaotic. His colleagues at Hogwarts might be extremely shocked. Maybe Dumbledore would have to take on the role of caretaker, trying to figure out how to reverse the spell. And Harry Potter would probably be very confused seeing his former strict professor as a helpless baby.
Well, in this kind of fanfiction, probably his friends would be super shocked at first. They might struggle to take care of him as he's now a baby. His powers could also be affected in some strange ways, like they might be uncontrollable or show up in unexpected forms since he's in a baby's body.
In the 'ichigo turns into a baby fanfiction', his relationships would change significantly. For example, Rukia might take on a more motherly role towards him. His friends would be very confused at first but then would do their best to keep him safe and figure out how to turn him back. Also, his enemies might see this as an opportunity to finally get rid of him, but his friends would surely not let that happen.
In such a fanfiction, there could be a lot of chaos. Maybe Harry and Ron would be completely clueless on how to take care of baby Hermione. They might struggle with simple things like feeding her or changing her diapers. It could also be a really cute scenario where they try their best to protect her in this vulnerable state.