Board Thread:Versus Debates/@comment-29899821-20160317090255/@comment-26866422-20160512233630

Well there was hypothesis once that Susano'o was yin-yang form, which awakens after you unlock yin type genjutsu and yang type ninjutsu. So in one eye genjutsu and in second ninjutsu. But point here is that we have two eye same jutsu in two cases. Kamui and Kotoamatsukami.

i dont think that you get solid Susano'o with MS only. I bet Itachi said that EMS unlocks another jutsu as well, which is PS i think. So everything we have known about MS was suddenly a mess. I get it that Kakashi used Susano'o because he got pure Uchiha+Senju+a bit of Juubi chakra, but everything Sasuke achieved so quickly is because of Indra chakra. if this was Kishi's aim, to discredit Sasuke and empower Itachi's and Shisui geniusness, he succeeded.

Moving on with topic at hand...Even if Shisui has Susano'o, it isnt enough to withstand BD or SENJUTSU: OODAMa Rasengan.