Oh, I love this idea! We sometimes like to imagine our loved ones will be reunited in the afterlife. We could have an afterlife world disconnected from our current worlds. It could be like heaven, and maybe there could be a hell, too. This would be so cool. I find it so hard to let go of my ghosts, but they’re annoying (I haven’t played with them since the update where they supposedly will break things less, to be fair) and I don’t like them inviting my sims out places via the phone. So I would rather release them from their world but keep them together somehow in another world.