After many millennia of ruling the universe, the various gods of the universe find their power diminishing. The gods came together and the ones with remaining power agreed to wage a battle for the control of the universe.
They realized the only way to do this was adapt to the modern age. They have agreed to a galactic battle of the bands.
Battling across times and all over the world, they agreed that the group with the most fans at the end of the tour will hold dominion over the universe.
You assemble a band of gods from the pantheons you can choose from. You plan Concerts to gain fans, rocking and rolling against each other to become the ultimate force in the universe.