Since Graham Hancock, as evidenced by his past writings, will almost certainly distort, fabricate and exaggerate aside rom relying on outdated and fringe sources while ignoring the more up to date and accurate sources. We can rest assured that the "masses" will be mislead and sold a bill of lying goods.
There is little evidence that past writings by Graham Hancock lead very many people into further serious research on the various "mysteries", (Most of the "mysteries" being long ago debunked.), instead what we got was many more people buying ever larger quantities of pseudo-science junk. People who enjoy Graham Hancock's books tend not to go to the library or book store to read the latest works by archeologists about various sites. Instead they tend to go to the occult sections of bookstores and read the latest in woo, fact free, yarns.
So I suspect that Graham Hancock will write a fact free tome pandering to his audience while taking pot shots at the "dogmatic" "orthodox" "mainstream" and thus discouraging his audience from finding out the truth. It will of course generate much lucre for Graham Hancock.