We all saw it coming with all the earlier armor marks Forge World has been releasing and the success of the Horus Heresy Black Library books. FW IA books for the Horus Heresy coming starting Autumn 2012.
Sixth edition....new Chaos Marines...now Horus Heresy IA books...oh my aching bank accounts!
Personally, what I'm looking forward to most are the limited edition empty bases representing the missing primarchs! ;-)