I'm curious to see how the spin-offs do. There isn't much of an arc to Wick's character in four films but people went to go watch Keanu be a bad motherfucker (he also spent a lot of time putting in the stunt and prep work for these films), curious if the interest in the universe will continue to exist without him and the other characters who will likely never be seen again because they're too expensive. apparently Yen has expressed interest in a film about Caine but circle back to my second sentence. Hong Kong Blood Operas are probably my favorite genre of film ever and this whole John Wick series was basically a high society take on HKBOs (compared to the much grittier films of the late 80s and 90s) which sort of went a bit beyond that scope once the original was such a success. btw, if you like this series of films, and I'm assuming you do, and the genre itself interests you, I would highly recommend A Better Tomorrow (the original not the remake), A Better Tomorrow II (but not III), The Killer, and Hard Boiled. those essentially started and grew the genre culminating in what most consider HKBO's crowning jewel in Hard Boiled. there's more depth to the genre than just this but it's a good start. watching those you'll see a lot of the building blocks of the John Wick films in them and a lot of modern gun-heavy action films in general, it's an influential genre for how tiny it is relative to other things.