Well, if it's a 'misremembered man novel', it might center around the consequences of misremembering a man. Maybe the misremembering leads to all sorts of misunderstandings, false accusations or even changes in the relationships within the story. For example, someone misremembers the man as a criminal, and this causes a chain of events that affects the whole community in the novel.
I'm not sure specifically as I haven't read a novel named exactly that. It could be about a man who is misremembered by others, perhaps his actions, identity or past are wrongly recalled by the characters in the story.
The 'misremembered man novel' could be exploring themes of memory, perception and truth. It could be that the man in question has a complex personality or a mysterious past. People in the novel misremember him because of their own biases, fears or simply the passage of time. This misremembering then becomes a driving force in the plot, leading to conflicts, revelations and ultimately, a deeper understanding of the nature of memory and human relationships.