It sounds like this is the same ending as earlier posters, but we saw Dawn and Brad basically engage in a "final battle" and then essentially morph into deities that kind of represent the Godfather that Brad had been speaking to and Dentata, arguing over who really defeated evil, as represented by the Pastor (at least that's my interpretation), while the rest of the stage is besieged by the four elements, until one of the former Promise Keeper Girls approaches a tree and takes a bite of an apple from it.
While talking with my friend afterwards, I saw that to mean something along the lines of "the cycle starts anew" and that this is essentially a fight that will never be resolved, or maybe the cycle beginning again is another chance to "get it right". Meanwhile, my friend was of the opinion that both Brad and Dawn (or whoever they were representing) should have taken a bite out of the apple together, since there was a lot of discourse about blaming Eve (and subsequent women) for tempting man to sin by eating the apple, and if they both ate it together, that would balance that act.