> if it exists then you have already won and lost every possible scenario, so the story becomes somewhat pointless

This brings up other interesting ideas though, such as perspectives on nihilism, and whether a meaningless universe is tragic and awful or liberating and beautiful, or all of the above or nothing at all. Characters can be apathetic and depressed in the face of nihilism, or compassionate and optimistic. In an existential vacuum, do people become corrupted or reveal their true selves? I think multiverses can be a good setting for philosophical conflicts