What with the sun's being about to enter its red-giant phase, God realized it was time to get the End Times rolling. (He had always thought that the imminent, literal end of the solar system would be a reasonably clear sign to everyone. But anyway...)
First, then, the tribulation. The Antichrist induced war among all men. Then came pestilence. Famine. Earthquakes. Surviving populations fled to caves to escape the molten fragments of planet and moon and star hurtling toward earth. The wicked were slaughtered, rendering the seas boiling cauldrons of human blood and viscera. In short, just the kind of wholesale ghastliness one would expect from the penultimate stage of any lovingly plotted eschatology.
But then the Messiah returned to earth. And the dead were resurrected. And the sinners were forever banished from the cosmos. And the rest were invited to join God in Heaven, for all eternity.
And so all of God's work was complete.
And then God pondered: Okay, what now?