Great Chapter.
Naruto on his way to see the 8 tails. Kisame will get a shock if he has to deal with the 2 of them
As to the coffin, I dont see it being the 4th hokage. I recon it will be the real body of Uchia Madara, or as boniceman said maybe Madara's brother.. Just from the "WiseGuy" remark makes me think Kabuto knows Madara's secret.
Also the 154-155 Animatons are out and Awsome.. Sage Training has started. And the intro is great as well...