Episode VI saw an end to the White Scars story as previous canon went. While deviating considerably from what we got in Index Astartes and the Collected Visions books, we saw the legion departing the battle between the Space Wolves and Alpha Legion. With both forces left behind along with any expectations of what was to follow, Episode VII now follows the tale taking a new route. Not only returning to the original themes of the book now the Space Wolves are out of the way for the moment, but also expanding upon the knowledge of the legion.
The good news is this is exactly what the serialised novel needed. The bad news is that not all of the new additions to the White Scars are good.
Foremost among these is a bit more of an exploration of who they are and why they have been so forgotten. This has been put down to the way in which the legion operates at least in part, but other previously foreshadowed elements are clearly in play. A section featuring a captain of a traitor legion highlights this extremely well where it almost seems as if a White Scars psyker blocks the last several minutes from his mind.