Most likely he will come back to destroy it.
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Sasuke is not gonna go back. Afterr he killed itachi he would have gone back. But Madara Uchiha told sasuke that itachi killed the clan becasue it was a mission from the leaf. If madara didnt tell him that sasuke would have went back to the village as the uchiha clan avenger. Now sasuke wants to destroy the leaf village. So he makes a Group called taka which is like the Akatsuki. The group has Karin,Jugo,Suigetsu and madara. Sasuke is trying to collect all tails which means he is bound to run into Naruto and there gonna have a battle. That's Basically it. ( In the manga sasuke goes back to the village i don't know what chapter but just to tell you)
After Itachi massacred the clan, Sasuke's innocence was corrupted, his ideals and personality changed severely, becoming cold, lonely, cruel, cynical, somewhat arrogant, and with the next nine years of his life devoted to killing Itachi. Although now Sasuke REGRETS killing itachi after remebering what a good brother he was.
Sasuke won't return to konoha In fact he wants to demolish the village pior to discovering that Itachi hid the truth of Danzou and the Anbu wanting him to annihilate the Uchiha clan. The Uchiha clan was planning a coup detat etc. (spoiler ^ ^")
as i think, yes. because if he revolves against konoha, and fights naruto, narutos special powers, especially, that given by itachi, will activate and stop sauske to go against konoha.
Well, their last name gives it away obviously. They are from the same clan. The only difference between them is the simple fact that 1) Uchiha Itachi & Sasuke are brothers. 2) Uchiha Madara & Izuna are brothers. 3) Whilst Uchiha Obito, is not a sibling of either. So really, it is just the simple fact that they come from the same clan, that is all.