I'm actually not a fan of those mega books. They're hard to read and a bit unwieldy
As for KA, the new series is an ongoing as is HG. We've got the first eight issues of HG done, but I only started KA at the end of last year and we'll release once we're way ahead. We're looking to mid to late Summer for both as they'll both launch same month.
I tend to work around a year ahead so after a very productive past 24 months am busy stockpiling at the moment. Starlight 2 among these btw. Am about halfway through that!