spoiler - Swann might not actually be dead.
I didnt catch this the first time around, but when i watched the movie the other day i caught something interesting. Okay, we have the scene where Swann body has the flesh removed, and then it goes to a scene where Bakula and Jamsen are walking away and she says that Swann always told here something to this extent - flesh is a prision for the soul/body? magic will set you free. Right after this theres a scene where they show a close up of swanns body in its skeletal form.
I mean it could be just a metaphor, but when you think about the sequence of these events, it kinda suggests that Swann is alive in some from or another, maybe he reached some true level of magical enlightenment that Nix couldnt.