Harold Camping, an 89 year old preacher has predicted that the world will end on May/21/11. His method for arriving at that date is based on mathematical formulas rather than the antics of Satan, The AntiChrist and The False Prophet in the biblical book of Revelation.
Reading through much of this stuff can make your head spin. It's open to interpretation like most materials in The Bible.
The Rapture of The Faithful could simply be a teleportation system of an advanced civilization. This used to happen regularly on Star Trek as an easy way to get from a starship to a planet or vice versa. "Beam me up Scotty, there's no intelligent life down here".
"The Revelation of St. John" reads like an alien invasion of Earth. Satan is tossed down to the planet and creates is own version of Jesus Christ in "The AntiChrist". "The False Prophet" then creates a world wide religion that worships this AntiChrist.
"The Second Coming of Christ" rescues the Christian Church from the bad guys who will probably be using super mind control devices on humanity.
When powerful beings fight each other, you get something that looks like a "A Civil War In The Q Continuum". It could get very nasty and maybe some humans need to be teleported away from the action.
In meantime, there are certain superbeings who's job is to prevent Earth from disappearing through a blackhole that appears every now and then closeby.