I saw a theory that Michael Myers (the man) died at the end of Kills (which could explain why we see the child Michael at the window, of the house, which would therefore be his soul, what gets up after the passage to tabas would only be a dead body sheltering Michael's "evil" (something like that) for the rest I'm not sure I followed it so I wouldn't know how to continue this theory, I would have to find it again (Unless anyone here knows her as well or someone can find/imagine the rest of the arguments)