Well, I doubt he will be a simulation, his voice yells at u during the sundial, like how shaxx yells during the crucible, this might also show that he won't go back, tho that's is the end of the season. And unrelated if he used to be the titan vanguard will he take the position back. If they only fill it upon the death of the old vanguard, he isn't dead anymore, he literally came back from death without a ghost(better than what zavala has ever done) or was he kicked out like osiris