Most beliefs have them - a place for the good and a place for the bad. Your actions in life determine where you go and what happens after. Simple enough. Or it was until the Prophecy. Something was coming. Something was building and it would affect everyone. Both sides. And neither was willing to wait.
I'm still not sure that a huge mistake hasn't been made, because I can give you names of people better suited for this than me. But... why not. Defeat an evil cockroach in a sentient street and then travel to... an afterlife?
Too much to hope there's a robotman wandering around? Or part cyborg part man? Or a fabulous hollywood actress? Or a.... a Jane?