Board Thread:Naruto Discussions/@comment-28294008-20160424155402/@comment-3965545-20160424234337

Saiyaman is right, Naruto may be a bit rusty, but once he breaks off the rust he is still the strongest living Shinobi.

On Narutoforums Takl already confirmed that Sasuke was indeed given Hashirama cells by Kabuto, in order to repair his heart.. and he was using Tobirama's guidance to do it correctly(Tobirama apparently experimented with his own brothers DNA which is very... weird)