I've been peeping Abnett's FB page, and I think
Salvation's Reach is going to be a good one. Last I heard was an October street date, and Abnett claims (probably truly, based on past performance) that he is going to be far from easy on some popular characters.
One interesting thing I learned is how much Abnett immerses himself in 40k while writing. Apparently, one scene in
'Reach will involve a *ahem*
non-standard use of Arvus lighters in an assault capacity. Well, it seems that Abnett had a 40k-scale one done up in and out and sat it on his desk to see how it works, what would happen in different situations, etc.
On an interesting side note, there was an ongoing conversation about who people thought would be cast in an
Eisenhorn movie; it's probably just a thought experiment, but one can hope.

Many people liked Ed Harris for Gregor Eisenhorn; the only role I felt pretty sure about was Jason Statham as Harlon Nayl. I think his voice carries the exact amount of menace, without actual evil. How about your thoughts on other characters?