So, despite call outs to the remainders in Rites of Battle, especially in terms of them being on the "Create a Chapter" tables... White Scars, Salamanders, Iron Hands, and Raven Guard.
We still have no rules for them. And when in Rites one of the 'create a chapter' things is to just base them on the progenitor chapter, that's 4 major chapters we can't do much with. Now, from looking at Rites. Iron Hands and Raven Guard you might be able to cobble something together with, might, the other two... probably not so much.
Looking at the release schedule, neither of the remaining books on it seem likely to have anything in them. Mark of the Xenos, well, this isn't about the Chapters! It's about what to kill. And the setting book, the Originals don't live in the region...
So when do you think we'll get the rest? Any hope of Web Supplements? Maybe the one for this book, to get even one would be pretty nice. Or some books way down the line. Which would suck, since that's still months away at best.