Game Update 51: Elements of Corruption will be hitting live servers soon, and the folks at EverQuest II have released a portion of the background lore behind the update.

…And the Nameless created the Gods and the Gods created all the races of Norrath to worship them and bring them honor and for many years all was well. But soon the Gods grew jealous and each coveted the worship of all mortals, that each might grow more powerful than the others. And the Gods of the Light and the Gods of the Dark made common cause against each other and mighty were the battles between them and all Norrath trembled.

Then came the Nameless, He who created all things and He who shall end all things, and He sent forth His avatar into the world saying "Keep thou the balance, that no lesser God shall rise all powerful, and that neither Light nor Dark shall reign supreme." And thus did Roehn Theer the Godslayer come to Norrath and so did the Gods come to fear one who was both less and more than a God and for a short time peace returned to Norrath.

But the Gods wished not for balance and together they caught the Godslayer unawares and threw him into the Void and bound him there, that they might advance their own ends in Norrath without fear of reprisal. And once more did Norrath tremble and all the races of Norrath bowed down before the Gods and the Gods strode without fear among men and we were much afraid...

Read the Elements of Corruption Lore.