Well considering that two of the known factions are named after religiously symbolic figures, Osiris and 7 Seraphs, I'd say there is a pretty good chance there will be some religious elements as part of Destiny's lore. What is interesting to me is I wonder has much the religions the faction names reflect will affect the back story for each faction. There are vast differences between the polytheistic Egyptian religion and the monotheistic based Judeo/Christian worldviews. ...and regardless of what you think about the topic of religion: crutch for the weak, gives significance to our entire existence, or are just ambivalent about it, having this element present is only reflective of what will always exist in society. Religions come and go, some endure from eons of time but some facet of society will always develop a system of religious belief and significance to there existence. Since Destiny is a dynamic universe, one where our community represents all of humanity in its various evolved forms (another interesting topic of conversation), I think including relgious elements is appropriate. I think you make a good point about Warlocks too. The underlying basis of most if not all Asian martial arts disciplines is religion and developing your skills as a fighter has as much if not more to do with developing some type of spiritual connection or understanding rather than simply mastering the physical actions.