It could be a random civilian. This would show Naruto the impact of the ninja world's violence on ordinary people, making him more determined to protect the innocent.
There may be some dark or alternate universe fanfictions out there with such a plot, but it goes against the general nature of the Naruto series. Naruto is more about friendship and growth, not about killing main characters like Tsunade in a random way.
Yes, there might be such fanfictions out there in the vast world of fan - created content. However, this goes against the general storyline of the Naruto series where they are comrades.
One aspect of this fanfiction could be the exploration of the harsh realities within the Naruto universe. It might show characters being forced to make difficult choices between killing their opponents or being killed themselves. This could lead to a deeper understanding of the moral gray areas that exist in a world full of ninja battles and power struggles.
No, it's not that common. Most Naruto fans still enjoy and contribute to the fanfiction community. While the official Naruto series is very popular, fanfiction offers unique interpretations and scenarios that the official story may not cover.
One possible reason could be a misunderstanding. Maybe Sakura is under the influence of some dark magic or mind - control in the fanfiction, which makes her lose her rational judgment and attack Naruto. Another reason might be a strong emotional outburst. For example, if she discovers something she believes Naruto has done wrong, but in fact it's a misinformation, and her anger gets the better of her, leading to her almost killing Naruto.
It could mean that in some way the official Naruto series or its developments have overshadowed or made fan - created Naruto fanfiction less relevant. For example, if the official storylines in Naruto cover all the interesting plot points that fans used to explore in fanfiction, then it's like the official work has 'killed' the need for some fan - made stories.
Another character could come to his rescue. For instance, Sasuke might show up at the crucial moment. Despite their complex relationship, Sasuke still values Naruto as a friend or rival. He intervenes and stops Sakura from killing Naruto. Or perhaps Kakashi, Naruto's teacher, arrives in time. He uses his Sharingan or some other jutsu to neutralize Sakura's attack and save Naruto.
If Naruto were killed by Kushina in a fanfiction, it would completely shatter the Naruto universe as we know it. Naruto is the main character, and his death would mean the end of his journey to become Hokage and bring peace. All the relationships he had built, like with Sasuke, Sakura, and his other friends, would be left in ruins. It would also mean that the prophecy about him might not be fulfilled, leading to a darker and more chaotic future for the Hidden Leaf Village.