But the novel by Eiji Yoshikawa, which Vagabond is inspired from btw, he does get married with Otsu.
I think it's safe to say that the manga will follow the novel(since after all it's adapted from it). I cannot say for sure that it will follow it faithfully, maybe some stuff like the Kojiro fight will follow real life
I don't know how that fight unfolds in the novel since I haven't read it.
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And the manga is not on hiatus. The next chapter is coming out on 03/19, as seen here