It depends on the platform or context where you shared your reaction. Usually, people who have access to the same story or the specific area where you posted your reaction can see it.
It depends. If you share your reaction publicly, like on a social media platform or in a group discussion, others can see it. But if you keep it to yourself or only tell a few trusted people, then no.
He'll likely lose his power and influence in the village. Once Naruto reveals his secrets, the villagers won't trust him anymore. His actions might be put on trial, and he could be exiled from the village.
One possible motive could be to gain control over Naruto's power. Since Naruto has the Nine - Tails within him, Danzo might want to use that power for his own political or military gains. He's always been power - hungry and sees Naruto as a tool to achieve his goals of making Konoha stronger in his own way, which might involve more underhanded and controlling methods.
It could also be a completely new character introduced into the fanfiction. A foreign ninja who was inspired by some of Danzo's ideas (not the bad ones) and comes to Konoha to take on the role of successor, bringing in new perspectives and ways of doing things.
They might be shocked and feel guilty. In the story, they could realize how much Naruto has endured alone. For example, Sasuke might have a complex mix of emotions, knowing Naruto has faced so many hardships while he was away.
Well, I could be really bummed out. Maybe I was looking forward to the plans and now I feel let down. Or I might also be understanding if they had a good reason and communicated it well.