DreAm_b0At
i dont know why but i think you want to finish bleach arc quickly. i think getting zanpakto is not possible for leo because he has to become shinigami like ichigo. i suggest finish this on hogyoku arc because leo ccant become sole king if he lasts until the end.so use the power of hogyoku to travell to next world. i can suggest "MAGI" world which has sinbad because it has djinn and can become "METAL VESSEL USER".and shinobu can become HOUSEHOLD user. and it has the concept of other world