o_o I didn't know it released so early, so I just read it.
My prediction for what's in the coffin: Izuna Uchiha, Madara's brother.
Overall, it was a good chapter.
I'm kind of interested in how Naruto will learn to control the fox, and I'm going to fall back on my Dad's prediction that "Naruto will make a deal with the fox, asking the fox to give Naruto complete control. The deal is, that after everything is settled, Naruto has let the fox go free." I think this might be the most logical course of action, because if Naruto doesn't expect to live, the fox won't live either.
Also, the Fox and Naruto don't seem as friendly towards each other as KB and his beast are, so I think that it would be very difficult for the 8 tails to train Naruto.
Regardless, I guess we'll just have to wait.