kabuto is lucky man
While Pain began his assault on Konoha, Yamato, along with Sai and Anko Mitarashi were sent on a mission to locate and capture Kabuto. Unfortunately, as they began to close in on him, Yamato detected that the seal he placed on Naruto was broken and he had transformed further than ever before; all the way to the Six-Tailed form. He quickly heads back to Konoha, knowing full well he is the only one with any chance of stopping and saving Naruto. Along the way, he finds to his horror that Naruto has already transformed to his Eight-Tailed stage, and consecutively to the Nine-Tailed stage and feared that he was too late.
THen the 4th appered & re invoked the seal
so yamato could have & did not have too go which means it was like fate that happend unless it was somehow meant to save the team from kabuto
IN my opinion even though ankos knows ALL OF orochimarus forbiddens techniques excluding the ones he has used she will still get owned BY kabuto shoot all of them will