My argument is very simple, and based on no currently established forms of religion of which I am aware.
Anyone who contends that once their life is over, they'll never be anything more is attempting to limit the capabilities of the Universe.
Regardless of what happened to bring the Universe and all of us into existence, it happened, and is certainly possible. Is it rational to assume it couldn't happen again?
Well there may well be new worlds formed like ours with - maybe - intelligent, social, creative, conscious animals. But even if a world physically identical to ours was formed and panned out just like this. The object identified as "Gregory Fenn" in that world WILL NOT be me. It will be at best something like me. Once the spacio/temporal continuity of MY existence is broken.. that's it, game over. (cheerfull I know)
but hang on a sec... let me think deeper for moment. The person of yesterday, today and tommorow are different and distinct and any notion of a 'self' is a psychological creation, not an actual object. The only sense in which the Greg of yesterday and today are the same person is by (IMHO) value judgements that this brain (and yesterday's and hopefully tommorow's) forms to judge that this body and these memories etc should be identified as properties of Gregory Fenn.
Now IF another world in the future (sort of...) is formed with something just like me, who (SOMEHOW) formed value judgements to identify itself as the "reincarnation" of Gregory Fenn ... then hypothetically, by my theory of identity, maybe, I could live again. maybe.
But I doubt very much that is naturally possible. It could of course be possible if a deity consciousness made it happen but I don't believe in any such being.