You're all overthinking this Jhin thing.

Everyone's flipping out about these teasers and what they mean for the lore. Like any investigative individual, I started trying to connect the dots on what the champions in the promos had in common in the lore. The answer is... Nothing. Literally, no two of them are linked in any way in the lore. So then I started thinking from another angle; a more practical one.

Zed is generally mid. Garen is usually top. Vi is pretty much always in the jungle. Sona is almost universally a support.

Clearly, the promos are just Riot letting us know that Jhin has the means to take on any champion in any role. Because the only way to make a champion cool at this point is to make them a literal Mary Sue.

(PS: It's not a gunshot, it's thunder. The electricity helps give that away, but just the sound itself... That's definitely not a gunshot. At best, it's thunder made to sound VAGUELY like a gunshot.)