I think they all expected as far as Shikamaru, Sai, and maybe Sakura goes. I know Naruto the best sensor out there so he had to sense Sasuke's evil intentions. That's why he's so calm. Kishi was dropping hints and foreshadowing his true goals for about 60 chapters or so. I wonder if the bijuu can still transmit their chakras to Naruto even though the under genjutsu.I knew it was coming, didn't realize it would happen that soon. lol Sasuke an opportunist.
Love how calm Naruto is. I think he expected this shyt.