Kind of thinking along the lines of Apple's implementation of a lot of popular modded software from iOS 6 into their release of iOS 7. Kind of listening to the modders and developing based on their idea. I think "Historical Religions" is a great idea... Each Civilization actually has the correct religion available for the era their leader is from. I also hope that Ethnic Units makes it so we don't have caucasian Zulu warriors running around. I'd also like to see a world fact book implemented, along with some flavors from Civ 4 like "best cities" overview, etc.