I think its Hidan. I am not sure why he would hate Sasuke for killing Itachi. But he was the only confirmed not dead akatsuki member that we know about.
It's kabuto. And the reason the fodder uchiha is after Sasuke is because they need to get rid of Sasuke because he knows everything about them.just like when kakashi knew of the Akatsuki and Itachi and kisame wanted to take him with them. Parallels is kishis fav
Makes more sense to be Shishui if this cloaked figure would hate Sasuke for killing Itachi his best friend. anyone else like Madara/Hidan or whoever makes no sense when that line is said from their perspective.
Apparently someone posted a spoiler of the new chap showing a potential "new" akatsuki member. And it's just theories here and there. Although not sure where they found the spoiler? :eww: