So re-watching some old episodes, specifically Ichigo vs Byakuya. He says something really interesting, I'm paraphrasing here but it's "How could he achieve bankai? Only precedent to achieve bankai in such a short period is a child out of the great noble houses!" I know Kubo doesn't really foreshadow, but it's still cool nonetheless that Byakuya called it out so long ago.
XI Wiki


