*Angels...gods...demons. Earth's past is filled with tales of immortals who ruled over common men. For centuries man has lived under the impression that these stories were all fantasies and fairy tales. But the time has come when they will be proven true and powerful immortals will walk among normal men again... and look to take their rightful place as rulers. A new chapter in the Grimm Universe begins here. *zenescope.com
This could be considered the prelude to Godstorm which officially starts in Grimm Fairy Tales: Angel.