Sounded as if it should be a Christian take on Revelation but in fact it bears no resemblance to any interpretation of Revelation that any denomination has ever come up with. Might have been better with no religious element at all and just an "escape from the aliens" plot. With that, it would have been reasonably good. But this will just annoy those who it is supposed to be aimed at while putting off unbelievers who might otherwise have enjoyed it for what it is.