From whatswithjeff.com: "Bleach 520 was recently released and it was an epic chapter. The chapter revealed some new interesting facts that will make you go “wow, I never thought about that“. I presumed that you have already read the chapter so I’m going to proceed with the review and discussion of Bleach chapter 520."
I've been out of the loop on Bleach... way out. lol
Now they want to teach him everything so he'll be much stronger than he already is.
There's a lot of talk about what it means by teaching him 'the sword'. I think it's just the title for set of skills he'll be learning while some think he'll be learning his swords name.