It will be the second half of the Kyuubi's chakra because Kurama's chakra is still sealed inside of Minato. That's my hope anyway, btw this chapter was EPIC!

I'm glad Sasuke made his decision to protect the village, I wonder how things are going to be for Naruto and Sasuke once everything is over. Also now that Sasuke has made his decision, I wonder if this means that even Orochimaru will become good, perhaps he is interested in Sasuke's resolve because he is probably questioning his own resolve.