Board Thread:Naruto Gaiden/@comment-25549954-20150527164334/@comment-3965545-20150530161846

http://img3.wikia.nocookie.net/__cb20150528060351/naruto/images/1/1c/Shin's_father.png

https://38.media.tumblr.com/c9867ed3a7b4063748b2f05518a5ff75/tumblr_n8h3yc6cSt1tfh0reo1_500.png

I'm still convinced there is a high chance it is Shisui..