Board Thread:Versus Debates/@comment-26636534-20161229223656/@comment-3965545-20170103163640

Itachi already knows what Tobirama can do.. he literally studied the past Kage and the history of Konoha, the history of the Senju and Uchiha. Nothing Tobirama could do would be a shock to Itachi. Itachi always finds weaknesses in every technique and he does it pretty fast. Tobirama's best bet is to try and finish Itachi quick because if he gives Itachi time to think and formulate his strategies then it's too late.