User blog:The Dreamer/Chekhov's Guns Yet To Be Fired

Obviously, we all know by now that Oda never forgets. I'm curious to see what elements of the story will surface in the second half, and we've got a whole decade to find out. Some dominant people in my mind are Kuro, Gin (since we all know how hard it is to die in this universe), and Koala, but I've also theorized something odd. After the time skip, Zoro only sees out of his right eye, and Sanji only sees out of his left. Does anyone else think that that's going to become significant later on? Perhaps someone with a Devil Fruit that lets them combine things? Aside from Wapol, that is...