Oh God...I'm still thinking about this. Maybe for a fanfiction if it's not the case? But what if this genjutsu is all from Naruto's perspective. I mean...he manages to accomplish his dream and actually achieve world peace with no explanation given. He also got Sasuke to somehow still be a part of Konoha. If he strongly believes that Sakura's feelings for Sasuke are still there :insert SS here. He's aware that Hinata loves him: Insert NH. At the beginning of part two he teased Shikatema: Insert them here. He knows that Ino also wanted to be with Sasuke, but Sai is his look alike soooo :Insert them here.
I don't know. It probably isn't possible and Kishi's just a terrible writer. But...it would make a good fanfiction ha ._.