i'm really looking forward to this, and i hope it isn't one of those really cool games that gets halfway done and then just gets abandoned, or stuck in dev hell or something.
from a few posts above i can see pregnancy will be added much later on, and thankfully not as a game-over mechanic, but i had a few more ideas that could link up with the pregnancy idea.
1. allow us to be a futanari goddess, and on that path all the unique NPCs or the NPCs the goddess fucks be women, so we can get our kick of pregnancy content without it being the goddess getting pregnant.
2. maybe tie in the pregnancy system with a battle-fuclk system. the goddess loses on battle or hasn't escaped a grab and gets fucked with a chance of being impregnated.
3. at the risk of this turning into a breeding/management game, i would say that allowing the goddess to get her followers knocked up for her would also work. the followers can go out and purposefully find something attractive - or 'lose' in battle - to get knocked up with, and those children can eventually become more followers.
4. this last one is personal preference...but let us make a cult. i want to be the bad guy here, i want to become the stereotypical demon lord and drown the world in sex and violence. let me make a kingdom of demons, all birthed form the goddess, and wage constant war on the surrounding kingdoms until there aren't any left, or the goddess loses. i don't expect this last one, it sounds like a lot of coding and effort, but it would be cool.