Has it occured to anyone that madara is smart and used itacis plans to his advantage
Itachi didnt want to let sasuke know for the reasons tobi told him, but we all know itachi didnt want tobi to meet talk or see sasuke.
The reason that tobi didnt explain is maybe because madaras eyes were taken and tobi needs to steal someone elses mangekyou, itachi was way too strong to try against, so maybe tobi is going to try and take sasukes eyes.
Maybe "take the eyes of your brother" is a loose term meaning family brethren.
Who knows, the manga stated sharingan genjutsu is special unlike other genjutsu but apparently you can counter mangekyou genjutsu the exact same way, which changed what the writers stated in the first stages of the manga, so its not unusual for the sharingan secrets to change