User blog comment:DirgeOfCerberus111/Space Wolves Successors: Canon or Not?/@comment-3258762-20121105072829

As our Space wolf expert *puts on his glasses* There are multiple reasons as to why the SWs cannot have successors.

1: The Canis Helix and the Wulfen. Many believe that this is only tempered because of the hardy people of Fenris. Take away being born on Fenris (One of the 3 harshest worlds in the Imperium) and I believe it is a recipe for disaster

2: Magnus sabotaging the project. (SPOILERS!!!!) During the Battle of the Fang, Magnus the Red had an ulterior motive other than cold revenge. In fact, for several centuries, the Wolf Priests of the Space Wolves had worked to remove the effects of the Canis Helix, and while making progress, had not come too far. Magnus destroyed all that research

3: Posibility of Russ' Psychic Power: Some would say that the reason the Space Wolves can hold the Wulfen and others cannot is because they are the chosen sons of Russ and that Russ has left a psychic imprint on them to mark them as unique. Thus there can be no new chapter as that would remove said mark.