>>529787284
any developer can use the Blood Ravens if GW allows, they're not owned by Sega or Relic, but by GW

but that's not the point, Blood Ravens were created specifically for DoW, the Retributors were created specifically for the Astartes show and most book series just creates their own sub-factions and character
if CA does make their own 40k game they should create their own chapter and characters instead of making a shitty adaptation of someone else's work