In general, the status of Naruto novels as canon can be a bit ambiguous. Some are closely tied to the main plot and characters, while others might be more like side stories or expansions that don't have a major impact on the core storyline.
Definitely not. In the Naruto series, we see Naruto's development as a ninja, his relationships with Sasuke, Sakura, Kakashi and others are based on mutual respect, friendship and the pursuit of common goals. This fanfiction idea is not only non - canon but also goes against the positive and family - friendly nature of the Naruto franchise.
Definitely not. The Naruto canon is based on ninja battles, friendship, and the pursuit of peace. The idea of Itachi getting Naruto pregnant has no basis in the original story's themes, character relationships, or the world - building that has been done. It's a fan - created concept that goes against the grain of the canon.
In a fanfiction, we could explore a story where Kushina survives the Nine - Tails attack. She then gets to be a part of Naruto's growth, teaching him about his Uzumaki heritage and how to control the Nine - Tails in a more personal way compared to what Jiraiya taught him.
One popular 'naruto canon fanfiction' story is 'The Legacy of the Uzumaki'. It delves into the untold stories of the Uzumaki clan. Another is 'Sasuke's Redemption', which focuses on Sasuke's journey to make up for his past mistakes. And 'Naruto's New Adventure' where Naruto discovers a new power that was previously unknown in the canon.
Well, it depends on how it's written. If it's just for shock value, it might not be a very good fanfic. But if the author has a well - thought - out plot that explains Naruto's actions, like if the Hokage has been secretly evil all along and Naruto discovers this and has to take drastic action, then it could be an interesting take. However, it's still a very controversial concept within the Naruto fan community.