I don't know why Ubisoft never added this version to the digital release, but I suspect it might be because this is outsourced out of Shanghai and Milan studios. However, I don't think this is a sequel, but rather an expansion to the first game, since Chaos Theory is considered a true sequel. I doubt they'll bring this back, but if they did, just included this game as a DLC.
Also this game is set in my country. Indonesian is really mindblowing that this Darah & Doa terrorist group reminds my whole country of that terrorist plot back in 2002 incident in Bali.