Could be both. He could be from the first generations of captains, division 0 or he came after Vaizards exile. I suppose you can't tell.
StealDragon: It is an interesting theory, but why would Uruhara train him?, If there is no conection before, just because he feels some spiritual power? And...well, basing myself in clothing is that clothes with the captain thing his previous garnment but, if he was trained after the reincarnation wouldn't he have "new clothes". Well I hate speculating too, but I just wanted to point it out.