We can anticipate fresh plot twists. Maybe it'll introduce new types of Hollows or Soul Reapers with unique abilities. It could also delve deeper into the relationships between the characters, such as Ichigo's bond with his friends and family in a more complex way.
Well, one thing that could go wrong is a misrepresentation of the characters' personalities. For example, if Ichigo was made to be overly timid when in the original he is brave. Another issue might be a jumbled plot. Maybe the fanfic tries to combine too many different storylines from different series in a way that makes no sense. Also, the power scaling could be off. If a minor character from another series is suddenly made much stronger than the main Bleach characters without proper explanation.
In my opinion, both have their merits. The anime brings the characters to life with animation and sound, but the manga allows for more imagination and detail in the panels. It really comes down to what you value more in your entertainment.
Bleach is not a novel. It's more famous for its manga and anime versions. The manga format allows for a more visually dynamic and action-packed presentation of the story compared to a traditional novel.
It's hard to say if it's common. There could be many people named 'bleach' out there, but we don't really know how many of them are fans of 'bleach' the series and also engage with fanfiction. It depends on how big the 'bleach' fan community is and how many people with that name happen to be part of it.
First, know the source materials well. Really understand the characters, their personalities, and the rules of the Bleach universe. Second, plan your plot carefully. Don't just randomly combine elements from different series. Third, keep the tone consistent. If Bleach has a certain level of seriousness, don't make the crossover too comical in a way that doesn't fit.
Rukia would probably be very critical at first. Since she is quite serious, she might nitpick the inaccuracies in the fanfiction. But she might also secretly enjoy the ones that show her in a positive light, like those highlighting her friendship with Ichigo. In the Bleach universe, characters are used to their own stories, and fanfiction would be a whole new and unexpected take on their lives. The zanpakuto spirits might also have interesting reactions if they could read, as they have their own personalities and might be offended or flattered by how they are depicted in the fanfictions.