Not a big surprise, considering the use of frogs was a HUUUUUUUUUUUGE hint but I'm more impressed with the planning of the whole operation, also, if I were in command of the ambu I would be plotting to kill Kawaki on my own, we just need to wait until Sasuke leaves the village because he's too broken.
But considering the very first chapter of this manga, we know that's not gonna be the case and it was all fruitless, which kinda ruins most of this development but oh well xP