He wants to kill Naruto, thus getting rid of the Kyuubi which was responsible for the attack (It was actually Obito's fault). Sasuke is clearly misinformed and he also doesn't know that Bijuu's are immortal.
You can see a picture of team 7, and Naruto is scratched off.
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Sasuke over here states that he wants to erase the past
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What did he mean by that? Sasuke is implying by Past = Kurama, because Kurama was involved in the attack on the village and lead to the Uchiha massacre, thus he wants to DELETE which would equal = Naruto because he is hosting Kurama and because of the attack, Itachi ended up having to murder the entire Uchiha clan.
Over here, even Juugo doesn't know about Sasuke's "real goal" is.
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Sasuke is shown darker, depicting a more darker, evil goal?
He also thinks killing the Bijuu is the answer, through power and force