I doubt he would give a damn tbh. Although there's a slightly greater chance of him caring for Naruto though, as he's a bit closer to him than kakashi/sakura.
I say no, because I still believe in the Sasuke I saw from part one. The Sasuke who put his grudge of killing Itachi aside and giving his life to save Naruto... That was a sweet moment!!! I love part one and Sasuke was way cooler and nicer there!!!!
if it was the last way to save the shinobi world....then yes or since hes arrogant at times he would try to find another way..afterall if anyone is going to kill naruto its him.
It doesn't even matter if it was to save the world for me, it could just be to save Sasuke, and Sasuke wouldn't bat an eye. If it saves his skin, he'd be fine.