Ok to start this post I would like to say that this is speculation from grimoire and in game experiences. So we all know that in destiny raids, you face the most powerful creatures that the darkness can throw at you. So far we have had Crota, Atheon, and the Templar. These creatures wield magical power that we don't understand. The vex and hive especially are known to be more of reality bending species than the cabal or the fallen. The cabal are unique in the four destiny species because they are known as an actual military. I'm just not sure how bungie could make raid mechanics around the cabal like they did with Crotas End or VOG. Let's look at PoE as an example. The cabal have one major boss with a mechanic: Valus Tru'ug. This boss's mechanic is that every time you bring down his shield, it changes to a different elemental shield. Now how unimaginative is that. You could have literally given that mechanic to any boss in the game. I think this shows how bungie might struggle making raid mechanics for the cabal. They are a military and they don't possess magical powers that most mechanics do. Now I love destiny but I would be surprised to see a cabal centered dlc or raid. They are frankly boring and kinda annoying because I can't one shot them with my fatebringer except for psions. Once again this is just speculation and I would love to see what you guys think.