ok. so heres what i think about all of the confusion that comes into this chapter. I think that sauske, being an uchiha has hatred. and its clear he hates whatever is causing the problem. First it was itachi, then the village, and now its anything that is trying to destroy what itachi wanted to protect. i think that Sai doesnt know what Sasukes goals are because he wasnt there when sauske said he would become hokage. As for the dark clouds approach line at the end. i beleive that is because of Orochimaru. i think that orochimaru will kill off the kages. and revive tsunade and jirayia and then the old sannin will fight team 7. i beleive this due to the third and fourths statements comparing team 7 to them