He would be happy to see itachi again, probaby cry..then try to make Itachi understand why he needs to kill all of konoha, not just for the sake of itachi, but the sake of his entire clan. I'll admit. If I had Sasuke's powers, and I find out my entire family was killed by the city I lived in, I would take revenge...But just on the city leaders. taking it out of the entire city is just mean. But yea, he wont want to, but he would fight itachi, cuz at this point, the only way to get through to sasuke is kicking his ass.