Originally posted by Kento
Not really. Itachi is a lot more powerful than Kakashi. There isn't any reason to believe just because Kakashi has a MS he's going to be able to win. Naruto's pretty much out of the fight at the start with even the lowest level on genjutsu then it's Kakashi vs Itachi and that battles going to Itachi with ease. War of Sharingan would be the worst angle for Kakashi to try and win from but pretty much any way he tries to win he'll loose.
Um I never said Kakashi would win all I said was that MS may allow him to resist Tsukiyomi. He will lose because Itchi's other techniques are too powerful.