A respected Chapter Master of this Forum made an interesting comment that it was important to remember that 40k is a setting not a story. It is merely a place where WE tell the stories. First, Warhammer has become a distinct entity apart from the game, and second, not only is this guy so wrong that it borders on heresy, his arrogance spits in the face of every author and fan the Black Library has ever had. Drawing this bloody distinction with semantics is tedious to the point of comparision to standing in line at the DMV, And yes, I am do feel that some reductio ad absurdum is necessary in this case; saying 40k is not a story is like saying the Greek Pantheon is just a backdrop for the Illiad or the Odyssey. And if WE are the directors of the 40k universe, then why is there a standard for canonization of lore? There is a certain standard that must be met to contribute to the universe, that which is not is fan fiction and not part of the timeline. What you do at your local game shop does not affect the storyline as per the BB. Even the broad story follows a traditional story arc. Which I can map out for you if you still want to argue, but when you say that it is only a setting, it is dismissive of the work of art we’ve been given; there is no humility or gratitude with such arrogance. Give the Black Library its due. It’s like saying Middle Earth is just a setting for us to play our little war games on, as if Tolkien spent his whole life constructing multiple languages, and family trees, and stories, so that a handful of cosplay nerds could geek out over some dice. Just because some guys decided to have an extra-canonical conflict between the sisters of battle and the 501st Cadian doesn’t make it an official event. LOTR is a setting for games workshop, but he didn’t write his stories for your games to dictate the direction of his story. Are we really so self-important to think that we are all that involved in Blanche’s art work or Abnett’s next book? No, there are guys with good taste at the top calling the shots and thank God too based on some of the human waste-lands I’ve seen at local game shops. And, in case you’ve not noticed, with A Thousand Sons making it on the NY Times Bestseller list, the universe has taken a life of its own apart from the game. Popular vote will never dictate canonization, qualified authors will do that, because if they didn’t, if the typical gamer was calling the shots, the Astartes would be bedding Inquisitors in some awful fanboy’s fantasy and you’d have Warhammer/Twilight crossovers.