A leaked image just broke, Space Wolves on the cover of a February 6th cover of White Dwarf! These look like the Wulfen! If you don't know the lore, they are Space Wolves who have been overcome by the Curse of the Wulfen transforming with wolf like features.... sound familiar to the rumored title of the next campaign?
via G8Keeper on Warseer
and you can also see it over here on Waaaghgaming
Over on Waaaghgaming
Best place for 40k Lore on the Wulfen! 40k Wiki (without pop up ads)