In the end, it looks like Oden and Ryuma were introduced as Zoro's goals from Wano and on ward
By the end of the King battle, he admitted Oden had better haki control(to tame Enma) and in this chapter, it seems he sees Oden as a goal to overcome, all of that including the black blade stuff, which will be the accomplishment showing he surpassed Oden
And Ryuma was the sword god, with Oda foreshadowing some kind of similarity between them, and creating a parallel between Joyboy and Ryuma
By the end of the King battle, he admitted Oden had better haki control(to tame Enma) and in this chapter, it seems he sees Oden as a goal to overcome, all of that including the black blade stuff, which will be the accomplishment showing he surpassed Oden
And Ryuma was the sword god, with Oda foreshadowing some kind of similarity between them, and creating a parallel between Joyboy and Ryuma