Alternate universes. Like, Superman and his friends could all be here and not know each other because one was from a comic book and one was from a movie and one was from a television show or something. So maybe out there somewhere is a Sherlock movie and he is just like your dad. Or maybe there's a Moriarty spin-off series all about him ugh he'd like that, too. I don't know, but they're totally the same guy.