Sasuke is in Konoha, and he seeks revenge against Konoha.. Konoha is defenseless..... or atleast has weak defense...So here is the theory:
Sasuke will go do what he has to do. And then will be filled up by more Hatred. And then will go on to repeat what Itachi did to the Uchiha. But then the Konoha ninjas will notice and this will lead to a Major fight in the village. In which people like Konohamaru and etc will realize the truth behind the Uchiha Massacre, and realize how Konoha was back then.
However, Kabuto by that time might break out of Izanami and come protect the village that jacked his childhood. And Kabuto might prove too much for Sasuke and Oro , so Oro helps Sasuke escape.. And then its a full Oro vs Kabuto. In which Kabuto will win. And then will go on to Assist Naruto.. or maybe go against Sasuke and loose to him.