Armeggedon in Las Vegas

Stop me if this has been done before, but what about the final battle of Good (ethereal angels) and Evil (terrifying devils) fought on the ruins of Las Vegas. A place of beauty, glamour and wealth completely mixed into a place of filth and vice, lost in the wasteland of the world's advanced leading nation. Modern Age's Sodom & Gomorrah; wiped out from God's Divine Judgement of fire & brimstone. All human souls thay die are either promoted to soldiers of God, slaves of Satan, or suffering in Limbo, too lost and confused to pledge alligiance to anyone. The last battle is for the lost souls.