This is an interesting topic that’s got my noggin joggin, and I think Bates already is in a hostile faction as much as he would vehemently deny it. He might not be Scourge and he might not be Forsaken, but he is a member of Duskwood’s restless dead at Raven Hill, most of which were under the control of Morbent Fel, but without him it’s the Torch of Holy Flame keeping all the cemetery’s undead at bay. (Terror by Torchlight was such a nice update to the zone’s lore) He still sees these shambling corpses as his people, cause a lot of them were his people, ones he feels guilty about not saving when the Orcs invaded. Ones he feels guilty about not saving when a necromancer enslaved them.
Anyway I think I’d call them Forsaken 2: Duskwood Boogaloo