User blog comment:DirgeOfCerberus111/Space Wolves Successors: Canon or Not?/@comment-3258762-20121105072829/@comment-3258762-20121105193128

Certainly. But that is if the 3rd isn't true, and we do know that Russ was either a psychic or could shout at a new level of sound, because when the SW, TS and WB were conquering a world, Russ roared so loud that most psykers fell to their knees with blood pouring from their noses and all the glass cracked.

So it is fully possible that Russ put such a mark on his pack.

There is, of course, the posibility of the SWs own markings. As the Warp is affected by what you think, and the SWs like to think alot of themselves (Their Anti-Warp talismans work only because they think they work) it could be that they put the imprint of their primarch on themselves.