I'm the same way as LeeRoy in keeping my own multiverse separate from this multiverse in canon. Even in my multiverse where I have other stories inside it, those stories exist in my multiverse in canon but said stories also exist in their own canon without the multiverse involvement. Let's say I invented Naruto. I could have a Naruto setting without having any outside involvement from the multiverse (the multiverse doesn't even exist in the canon of that story). However, if going within the canon of the multiverse, they can visit my Naruto world and pick up Naruto to take him to another planet.