Immediate reaction by most people will probably be, “OMG Sakura you traitorous bitch. That’s why you were going to put your teammates to sleep!”, but I’d like to believe there’s more to it than what’s on the surface. My hunch right now is that Sakura has decided to take the underhanded assassination approach (befitting of a ninja) since she knows she can’t take out Sasuke head-on. Assuming that Sasuke actually takes her in as the new replacement fodder for Karin, it could very well be that Sakura’s planning to kill Sasuke when he has his guard down. To deceive your enemies, you have to first deceive your friends right? I’m not saying she’ll succeed when Sasuke never seems to let his guard down, but it sounds like a feasible plan. Of course, I could be completely off so take that thought with a grain of salt. However, I’m not quite sure anyone would like Sakura anymore if she’s known as the girl who gives empty confessions and jumps ship right after.
On that note, I wonder if this means that Karin will be the new female replacement on the good guys’ side while Sakura tries to go through with her stint. Perhaps Kishimoto wants to see if Karin’s popularity will take off as the new female lead in the series since people like me never really cared for Sakura. I say that jokingly, but I wouldn’t rule out the possibility completely. For those who weren’t convinced that Karin was really dead last time, my sentiments were the same as someone’s death is highly suspect in this manga until they have either a flashback or a funeral for them. Even then, you still run into the ultimate deux ex machina care of characters like Pain, so yeah, make that I won’t believe anyone’s dead until a bunch of chapters later and their corpse is rotting in front of everyone. (This includes Kisame by the way.)
As for Danzou, all I’ll say about him is that I thought he destroyed his upper body with that desperation technique last time, so I’m surprised his body was still in one piece. At least he destroyed Shisui’s eye before going out with a bang, so tough luck for Madara.