I’ve been hurt before (ok, mildly annoyed at worst), but I’d be a little surprised if we did NOT see some sort of book for sale by GenCon. I know the box sets are a big deal, but historically CGL has produced lots and lots of book/PDF content, especially for BattleTech. They have a pipeline for print products, and I doubt the updated pack-in manuals for the boxed sets are enough work to consume it for a whole year, especially given the pace they managed for the last couple years for generating books and PDFs.
I want to believe...although I still want to believe in CM:Davion as well, so maybe I’m not the best at making rational judgements about future products!