As a horror movie, meh, but it's okay. Like I said, Jurgen Prochnow is awesome in it.
I think that John would have to keep his head down -- a guy who is immortal would kind of throw a monkey wrench into the "blessed are those who do not see, but believe" bit. So, while I think he'd be raging a bit about the way that the church operates, I'm not sure that he'd be able to do a lot about it. Unless, perhaps, he's been some of the key figures guiding its path over the years... Augustine, Aquinas, Luther, Wesley... I don't know, Jonathan Edwards? John Paul II? Billy Graham?
(Purely fictional speculation, probably need to put in a disclaimer like that
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