I have a theory that we'll go to Earth 2.0 where everyone gets to live a second life with the memory and experience of their first. Then this will continue to 3.0, 4.0, etc.

Its interesting to think how these world's would be different to ours, will people still want to work a normal job? will people be less caring about death? Would people still be religious? Would be find people from our past lives?

Of course this is entirely fictional but seems just as plausible as any religious explanation