Board Thread:Naruto Gaiden/@comment-25549954-20150527164334/@comment-1512913-20150529114623

If it turns out to be Shisui then Kishi has some explainin' to do. About his goal to restore Akatsuki, there were several version of it, but it's most likely he is talking about the "true true" Akatsuki of Madara/Black Zetsu/Obito's, meant to capture the Tailed Beasts, seal them into Demonic Statue and restore the Ten-Tails, not Nagato or Yahiko's Akatsuki.

In that case, this man's (presumed to be Shisui) plan is to revive Kaguya, again. And to bring her back the Rinnegan is kinda needed and guess who has it, his target Sasuke.