i think it will be the 3rd and naruto will calm down because of all the sentiments he had for the sandaime. and then blabla, becomes soulless, naruto get's angrier than ever, defeats the third. injures oro and uses his special power of belief on sasuke who gets homesick andcomes back home.

Or, the one inside the coffin is sasuke. who died of the immense power he had gained. or something.. i think sasuke being in the coffin doesn't sound too far off... as oro did say he wanted to see who had gotten stronger...