The (What I believe to be almost certain to be true) head authors and editors of Black Library will not finish the Heresy story and fill it out, until we stop caring and they need the extra cash.) That could happen in twenty or thirty years when we stop obsessing (I am as guilty as most). They don't want to finish story lines because then they get paid less as a company. Anyone who thinks GW and BL are a company that doesn't do this for money is incorrect. I think it might even take seven standard years (in real life) to even start the actual battle of Terra. Get read to wait forever, it's a business. Just because they are creative and sometimes great authors does NOT MEAN they give a damn if we get our answers quickly.