ITS ALIVE!!!!!!!!! Aither, for bleach you can just mame it like a cartoon, it only ends when you end up beating a dead hores. Bleach could be your fun haply time novel, for me im just happy that its first chapter makes the OG bleach have a good ending
It would be nice if you can actually integrate his background into the world he goes to. For example, his Excalibur being the real Excalibur of that world, or the world having the same history of Arthur as his own history. Make it so that everything can be explained without mentioning multiverses for worlds that is like ours such as academia city. If it is a complete foreign world, being from another dimension is fine.