We may have to face some remaining shadows. So far we haven't heard from Sekris the Baron of Shanks, or Valus Nohr, or Feltroc, all of which were the previous names listed on the Prestige Gear before the lore change. Even then, the three might be dead after the attempted assassination of Ghaul described in the Warlock normal set. If none of those, then it has to be another soldier under his command. Unlikely to be Arkborn since Calus left them alone after the Fulminator joined his cause. His conspirators are likely back at the Cabal homeworld, regulating things. There are three major conspirators left, and the OXA Machine is with them. The conspirators are Caiatl (Calus's Daughter), Otzot (Freeborn Psion), and Umun Arath (Primus of all Legions, possibly Xivu Arath in disguise).