Of course, religions will be added and they will be procedural! That's a goal a little far in the future though. I want to start with simple belief systems akin to animism and shamanism, which are more naturalistic and closer to physical reality (in a mystical sense). If you have read about how I generate languages and names in the game, you'll see that I use an element system that is tied to the biomes and the environment. This element system could easily be expanded upon to be used in the creation of simple nature-worshiping belief systems.