World Peace....Followed by the largest Double Rainbow ever seen across the entire planet from north to south pole!
Then abominations, arcane terrors, demons, malificar, blood mages, brigands, thieves, bandits, darkspawn, golems, and harvestors will all rise from the ocean to destroy the entire planet, engulfing it in flames. Repent, the end is nigh!
All the humans will curse the maker for the evils that he created, thus the third great sin of man shall come = blasphemy. With a heavy sigh, the maker shall create a new planet of marvelous things.
Thus the hubris of man shall no more desecrate the mighty name of the maker, *insert appropriate title here*.
In all seriousness the only thing that would happen would be either a return of the worship of the old gods or the creation of a new religion created to explain the world. Many civilizations have risen and fallen, all the gods and culture forgotten. New countries with new beliefs rise up and take the place of the old.