When the chapter was proceeding I was like "show me the freaking sword, show me the freaking sword :devil:", for a moment I thought Kubo still wouldn't reveal it this chapter ~_~
Didn't expect two weapons, though it's obvious were it originates from: one for each of his 'powers'. But I personally like the fact a lot more that this is some kind of an Ichigo version of the legendary katana x wakizashi combo (the Daisho). I prefer that reference above the symbolism of his dualistic powers for what I hope is now finally his last sword upgrade.
Now considering those funny holes in the swords, I guess he might be able to fire the wakizashi using the katana as a bow in the nature of firing a Quincy arrow/Cero/Getsuga Tenshou or all at the same time.