I'm not sure specifically about 'james disowns harry' fanfics being extremely popular. There are so many fanfics out there that it's hard to single out ones with this exact plot as being super popular. But in the vast world of fanfiction, any plot that involves a major relationship change like this could potentially have a following.
Well, it could mean in a fan - made story (fanfic), the character James disowns Harry. Maybe there's some sort of conflict or plot development where James, for whatever reason, decides to no longer consider Harry as part of his family or group.
One possible reason could be a dark magic influence on James Potter in the fanfiction. Maybe he's been cursed or possessed, causing him to act out of character and disown Harry.
It could mean that in a fanfic (fan fiction), Lily (presumably Harry Potter's mother Lily Potter) is depicted as disowning Harry. This might be a very unorthodox or dark take on the Harry Potter story, as in the original canon, Lily sacrificed herself to protect Harry.
I haven't come across any extremely popular 'lily disowns harry fanfic' myself. Popular fanfics usually tend to stick to the more beloved aspects of the original story or expand on them in a positive way. A plot where Lily disowns Harry is so against the essence of the original story that it may not gain as much popularity. But in the huge world of fanfic, there could be some hidden gems or very specific - interest pieces that deal with this, but they probably don't have a wide - reaching popularity.
The disownment could also change the relationships between other characters. For example, Harry's friends might become more protective of him, or some characters who were once neutral might side with Harry against James. It can also lead to a rift in the wizarding community if James is a well - respected figure. People might take sides, causing political and social unrest within the magical world. This can completely shift the focus of the story from the original plot to one centered around family drama and its consequences.
One possible plot could be that Harry has a major disagreement with Ravenclaw values. Maybe he feels that Ravenclaw's focus on knowledge and intellect has been misused in some way within the wizarding world. For example, he discovers that some Ravenclaw descendants are using their intelligence to create dark spells under the guise of academic research. This could lead him to publicly disown Ravenclaw as a house, causing a huge uproar in the Hogwarts community.
Yes, there are likely to be such fanfics in the vast world of fanfiction. You can try searching on popular fanfic websites like Archive of Our Own or FanFiction.net. Just use the relevant keywords in the search bar, and you might find some interesting stories exploring the relationship of Harry being James' cousin.
Yes, in some fanfics, Harry can be depicted as James' older brother. Fanfic writers often like to play around with the family relationships in the Harry Potter universe to create unique storylines.
Sure. There could be many fanfics out there with this premise. It might show how Harry would have grown up in a different family dynamic, having James as his brother. Maybe he would have been more involved in the early Order of the Phoenix activities, or his relationship with Dumbledore could have been shaped differently due to his new family connection.