I want it to ultimately end with Dean saving Sam because it is about the saving the people, not fighting the war. And Dean Winchester doesn't believe in destiny.

i want it to end this way too. my feeling on it is this: the show started with them fighting other things, not each other(not talking about conflicting personalities), and it should end that way. plus, i think that if kripke killed one or both of them again, it'd be a little repetitive. but then again, kripke is twisted and would make them battle and kill each other, so i don't know. but if something happens to one and not the other, i think the surviving member will do something stupid(like kill himself?)because it's clear that neither one of them can or want to live without the other one.