@Severen: THIS is where I can help someone, finally! I spent a long time studying early Christianity and the religions that lead to it, those being Judaism and Zoroastrianism, which may be the single most important religion no one has ever heard of.
To make a long story short, the Jews got the idea of eschatology ("the end of the world" basically) during the Babylonian Exile, as their captors were Zoroastrians, or Parsees. The Zoroastrian scriptures say that at the end of the world, Ahura Mazda who is basically the Parsee God-figure will wage war against the extant forces of Angra Mainyu/Ahriman (the "Devil"), melt all the metals in the earth's crust (compare this with Revelation...) and it will flood the entire world and flow down to Worst Existence (Hell, more or less). Righteous people will perceive it as something like a warm milk bath, but the wicked including Angra Mainyu will be utterly annihilated, burned both physically and metaphysically such that they can never exist again.
Plus, many of the early churches and church fathers were Annihilationist or even Universalist. My own admittedly poor reading of the Koine the oldest extant manuscripts we have are written in also reveals something interesting: Matthew 25:47, the end of the Parable of the Sheep and Goats, reads "and these shall go away into eternal punishment" in English. But in Greek, the words are "aionios kolasis," roughly "age-enduring chastisement/correction." I personally believe an Annihilationist reading of the Bible is correct, that it is saying that at some point evil and the doers thereof will be completely, utterly destroyed. It's very Zoroastrian itself.