So it'll be the same old,same old. I can't see there being anything different unless the authors have first-hand knowledge of something,and of that I wouldn't think so,unless there's a third party who was involved in the investigation.
At BEST it could be a more thoroughly detailed explanation of the evidence against Jeremy.
SOME people who support Jeremy are ignorant of the full evidence against him and believe myths and this could thus sway their opinion by dispelling those myths and presenting in detail the case against him.
Those who are on his side because of bias will not change no matter how many times the myths are dispelled or how many times the evidence in full is brought to bear. They will continue to ignore it though they can't refute it.
Nothing is going to convince his diehard supporters of his guilt so the book will never do such.
It will at best stand in the way of propagandizing to a new crop of people.
It might very well attack his past defenders, idendify lies they tell for him and thus actually attack Jerey's supporters more than just generally busting myths. We don' know if he will do that or not but I have a feeling he will based on somethings I have seen.
It might not touch upon the evidence that convicted him in any greater detail than past works did in which case it will be even less interesting and just more of the same old.
The notion he might find some truly new evidence I find not plausible. We shall see.