Throughout BFA, as horde, we were given just subtle suggestions on what bwonsamdi was up to. We know that he was completely against sylvanas raising the dead into undead, because as a death entity he needed the souls of the dead to be pulled into the afterlife.
we also found out he had a boss he refereed to, suggesting he's really just a lower entity to a much larger being.
I think it goes without saying that the larger entity he's referring to is either the jailer or the arbiter. Based on everything we know, the arbiter is the entity that decides on where souls end up in the shadowlands, while the jailer is the one containing the souls in the maw. Between these two, I would say the jailer would more suit what bwonsamdi refereed to as his boss.
This is where the questions come in. If the jailer is bwonsamdi's boss, as in the souls bwonsamdi collected were sent to him, did bwonsamdi know what the jailer was doing, as in bringing all souls into the maw to gain power?
And if bwonsamdi has been part of the jailers plan, which now would put bwonsamdi at odds with all living souls such as us, who is going to go into the shadowlands to stop the jailer doing this, does that mean we're be facing bwonsamdi as a foe?
Also as he was against sylvanas for raising the undead, yet she is now the jailers trophy wife, how does this tie in with him doing these deeds for the jailer and not questioning sylvanas suddenly being the jailers fav pet?