There have been multiple stories built around the plotline that the old gods of mythology still exist and choose a mortal to bless/help/inherit their powers, etc.
What I would like to see is a longish story that is similar but actually details why the old gods "vanished". All the myths have them interacting frequently with mortals yet their religions faded away slowly over centuries due to no more god/mortal interactions causing belief in them to dwindle.
My thought would be that the gods took human form (but not mortal) and interacted with mortals frequently for centuries but got tired of mortal squabbling, greediness, etc and decided to decorporealize (leave their human form) to cut off human contact with them. The decorporealization of the gods released all their power into the ether that pervades our universe. And it is this empowered ether that is the lifeforce of the universe, the spark of creation, the beginning and end of all the gods of all the pantheons.
And the ether has decided it is time to introduce new gods to guide humanity. But every time in the past that the ether created new gods, their internal bickering with each other was more important to them than guiding humanity and their separateness from humanity was ultimately ended up causing them to decorporealize. So what does the ether decide to do to fix this?