I think there are many possibilities. If I focus on Greek gods (which we know best, in particular the olimpians), we could see the following possibilities: Zeus: A bit too general to put in statsPoseidon: god of the seas: faster and stronger shipsHera: Empower women: give them better attack/defense statsDemeter: Gather grain a lot fasterApollo: perhaps the most supernatural of the gods. Could improve some stats for healers, temples or auto-healing.Artemis: Better hunting stats, and lower unit training time (goddess of hunt and fertility)Hephaestus: A blacksmith: units get stronger weapons and armourAthena: Goddess of strategy and wisdom, maybe stronger or faster-to-construct buildings, not sure if that relates. Maybe better tools (like siege engines) would be appropriate too.Ares: God of war, so I guess just upping a few battle statsAphrodite: Shorter training time for all unitsHermes: also a rather supernatural god. I can see some interesting things like bringing soldiers back from the death, but it's rather different from the current techs and auras we have now. Maybe we could also focus on his protection of travellers and trade.Dionysus: basically the god of the festivals and alcohol. Not sure how to put this into positive stats.So if we pick a few gods per civ, there are certainly enough possibilities for Greek and Roman civs. For other civs, it might be more difficult to find.