indiana jones and the kingdom of the crystal skull

So aparently my speculations about the upcoming Indiana Jones film back in indiana jones and the spear of destiny were totally off the mark. The new film will be called Indiana Jones and the Kingdom of the Crystal Skull and will center around crystal skulls which are a part of pre-Columbian culture rather than the Abrahamic tradition. It makes me wonder if across the various incarnations of the Indiana Jones stories; the movies, the television series, the novels (graphic and otherwise) etc. does the theology get any clearer? In the first and third films, we see Judeo-Christian relics which are clearly endowed with real power. But in second film, we see Hinduism-related artificats which are also "real". So will this fourth film help clarify the issue or will it make things more complex by throwing another pantheon into the mix? Or have things already been "mixed" in the other Indiana Jones stories?

see also
indiana jones and the temple of orientalism