Jhin lore: What are your theories/thoughts?

So Jhin was finally officially revealed in some recent time (I actually have no idea because I'm not usually caught up on this sort of thing). I saw the official videos of his kit, playstyle, etc. on the League website and I realized that there's not much connection between this guy and our four affected Champions (Zed, Sona, Vi, and Garen) other than that they ended up being in his videos which demonstrate what his abilities are. I know the lore isn't released yet, but I'm wondering how a guy that wields a gun, is a cyborg, and builds attack speed but doesn't actually is related to these four Champions who I'm still having a hard time seeing a connection between them. So, what do you think is the deal with him?, and how do you personally think he is related to the four Champions? (I've also seen a lot of complaints about his kit, even though he was just recently released...gonna have to sift through the stuff to find out what's up with that e.e)