Neo's people now have psychic powers and can't reproduce with any other races.
Any fertility deity may be miffed at him for doing so.
We may or may not have the gods of Celestial Objects (Sun, Moon, Stars) be NPCs.
Neo wants to make a god of power/force.
I'm going to make some more underworld deities for Ahmret (The god of the dead).
“She'd become a governess. It was one of the few jobs a known lady could do. And she'd taken to it well. She'd sworn that if she did indeed ever find herself dancing on rooftops with chimney sweeps she'd beat herself to death with her own umbrella.”
― Hogfather