Ultraman: I Am Galaxy

(This is a work of pure imagination by a new author, so leave your brain at the door.)

After an accident accelerates the growth of negative energy in the universe, Galaxy and Lugiel, guardians of the universe's source, transmigrate from the future to the present. They battle over how to preserve the universe's future, but the immense destruction their fight causes forces primordial gods like Noah to intervene. Then the unexpected happens: an unknown being interferes, and the sources of light and darkness purge the entire universe. Countless universes vanish. To restore peace, four gods sacrifice themselves, becoming primordial anchors that stabilize countless universes. Galaxy and Lugiel, whose battle had become the central stage, expend so much of their primordial power that they disappear into the universe.