Board Thread:Versus Debates/@comment-26272658-20150910213300/@comment-3965545-20150911210726

Danzo can't beat Shisui and he knows that. Hence the reason he not only had Anbu ready, but Izanagi's usage in mind too. Shisui also never wanted to fight him so he fled. Danzo only made him realize that not just Danzo, but the Uchiha would want his eyes too and he can't fight everybody at once. So for the sake of the village and the Uchiha, he gave his eye to Itachi, and in order to awaken Itachi's Mangekyo he committed Suicide in front of him. 1V1 with all intent to kill, Shisui would have killed Danzo.