I still think the 5th thing was kyuubis chakra.. we didn't see it fly into orochimaru at least and it seems to fly the other way.. but we'll find out.If that's true the only explanation i can come up with is nothing came out because the kyuubi itself is still alive and only his yin chakra was inside the death god. Since there was no physical body for the chakra to be bound by it just kinda left and we weren't even shown it coming out. I suppose either it went straight to Naruto, or will just be a mystery.
Hopefully we find out next week.