After the brotherly war, Sasuke fell into a seemingly endless dream. In the dream, his parents and clan members were still there. In the dream, his brother appeared in his world in another identity, but he was still the target of his eyes involuntarily. In the dream, he and his brother were classmates. In the dream, he and his brother were teammates. They performed various tasks together and experienced all kinds of things. In the dream, he finally got his brother's attention, but the dream was just a dream after all, and false dreams never came true.
PS: The Itachi in the dream is Itachi but not Itachi. It is the Itachi that Sasuke thinks and the Itachi that Sasuke hopes for. The most important and shocking thing is that the Itachi in the dream has a female body.