With GW attempting to move Chaos Marines further away from the 'Spiky Loyalists' it would be odd if they just put out palette swapped Guard, especially the Commissar (although that could be proxied as 'Traitor Officer' or some such).
Eh, I dunno. They just put out new basic CSM, Terminators and Havocs. I think the whole “Spikey Loyalist” thing is more of a fan concept than one that holds much sway in the Studio. Most of the Chaos lines come directly from traitor loyalists in one way or another.
More, GW has gone full speed ahead on making multiple lines of business from a singular development process. I can’t imagine they’d put out something like a full line of Traitor Guard in BSF without having larger plans for it in 40K.
Consider though that GW is doing everything they can to move loyalists away from OldMarines and into new Primaris only equipment. If Primaris do - well, more like when they do - get Terminator-esq gear it's probably going to look far and away from the existing kits. In that way, CSM's going forward will have a far more unique aesthetic because loyalist marine kits will have long abandoned it.
I suppose though they could do something like that for Traitor Guard. Produce a new posterboy regiment for the Guard whilst basing LatD off the Cadian aesthetic.
Edited by Lord Marshal, 30 March 2019 - 10:21 AM.