Following the bloodbath at The Continental Osaka, which saw Caine cut down Shimazu, Akira swears revenge against her father's killer and isn't seen again for the rest of the film. It's not like he was keen to do it, of course, given that Caine is under orders to take John down or anyone else helping him for fear of his own daughter being killed should he fail to do so. It was in the post-credit scene that we finally saw Akira go in for the kill, hoping to get blood for blood, until a swift cut to black stopped us from witnessing the outcome.

It's an unexpected extra to the story not just because it follows on from the fall of Mr. Wick, but it's teasing a spin-off that isn't either of the two already confirmed. Ana De Armas' "Ballerina" and the TV prequel show, "The Continental," have been well-known projects in development for some time and we haven't caught a glimpse of either so far. 

With that in mind, hinting at another area to push off from with this plotline is a welcome surprise, not only because it means more tales to tell in this world of markers, trackers, and tailored bulletproof suits, but because given the characters and story involved this could end up being a "John Wick" spin-off movie the franchise didn't know it needed.