When Hit Monkey arrives in Tokyo, during the brief montage you can see a couple taking a photo next to a man in a samurai outfit. This is most likely an Easter egg of the Silver Samurai. In the Marvel-616 comic-book universe, the Silver Samurai Kenuichio Harada was the first to don that mantle and was a sometime villain and foe to several Superheroes like the X-Men. He's also a sometime ally of Wolverine.