Eventually, we will have to face Oryx again. That's right. You heard it first. Oryx is one of three siblings. All 3 of them are the most powerful of all Hive, and due to the nature of their power, all 3 of them can be resurrected after death. All 3 of them have done this countless times before. So in other words, eventually we will face off against either one or both of Oryx siblings, and either they will revive Oryx (for us to kill him again) OR we will need to stop them before they finish his revival. Destiny 2 story arc confirmed ;)