One thing that is very interesting about the upcoming Traitor Legion supplement is exactly what is it a sopplement to.
The description in the post below says it is a supplement to Codex:CSM but this may not be the case.
The original source description indicates it is a supplement for Codex:Space Marines - note the missing "Chaos". This was assumed by a lot of reposters to be a typo.....but what if it isn't?
Now that would be interesting.
I'm sure we'll get more info but perhaps GW is maintaining the original command structure - using Space Marines as the base - and then providing a fix to reflect the Long War.
Roll on Dec 3!
Definitely a supplement for Codex:Chaos Space Marines so perhaps an opportunity lost