Meaning, will it be a bunch of reprinted material from Disciples of the Dark God's, The Radical's Handbook and various entries from Rogue Trader and Deathwatch?
We can assume at least 50-60 pages will be "rule" "repeats" and probably 50-80 pages of character classes, origins, skills and talents.
I can't go into any detail - NDAs and all that - but I can assure you that I wouldn't have spent a significant amount of time and effort on this book if the intent was just to cobble it together from scraps and reprints.
Though I may be considered a biased source, I feel that the work I did on Black Crusade is some of my best, that the team that wrote this book is in my opinion the best writing team that FFG have assembled for a 40kRP book yet, and that the material produced is top-notch. I am extremely proud to have worked on it.
Considering how similar your "house-ruled" stuff on your web page and most of the stuff that you've posted on these forums are to what i've come up with for my own games, i'm feeling very reassured by this.
I'm still sceptical to dedicating an entire game line to playing "the bad guys", but i'm willing to hold my judgement until I've actually seen how this will turn out.
It should at least give some interesting options and extra material for the existing game lines.