Firefly and Religion?

The TV show Firefly has been said to be a realistic representation of the future of Earth- A society in which Globalization has happened but still a mixing of cultures such as, Chinese and American language/culture being fused together. What do you think the religion of would be in a world like this? Obviously the show was cancelled before its time(Grrr), so I am unsure what the religion there is like. (Hopefully the new comic book series will shed some light on this).I imagine it is a blend of religion. There is Sheppard Book, but in the futuristic world of Firefly, Christians are a VERY small minority. What do you think it would be like, and is Firefly a realistic representation on the future of Globalization/Religion? Thank you