Nah, it's most likely just Madara's doing. Like I said, Danzo has not had any contact or even eye contact with Sasuke, so he wouldn't have been able to manipulate him in anyway. And Sasuke going nuts and causing a ruckus probably is a part of his plan in some way. I'll admit though, it would be crazy if Danzo was behind it. "Shit, the kages are onto me and my sharingan... go Sasuke-puppet!"
And I'm somewhat annoyed with the "unusualness" of Sasuke here too. To me, this is coming off as a way for Sasuke to be "redeemed" in the future. In other words, he's being controlled and actually kills people, once he snaps out of it he realizes what he's done and how easily he was manipulated, and then works to try and make up for it.
Personally I'd prefer if the "darkness and coldness" that Karin was sensing WAS actually Sasuke, mainly because I want Sasuke to be the "final villain" for Naruto. He just finally snaps and gets down to what he went there to do, and it's just a feeling that Karin isn't used to sensing from Sasuke. I still have hope that this is the case, based on the little chuckle from him after realizing that Zetsu had abandoned them in the previous chapter.