In a way I believe Danzo played apart in that, Danzo always said he wanted to become the hokage. Since Minato lost his life to stop the fox, that would be one person down. Plus, I remember in a previous chapter about raikage talking about when the sand village had a pact with orochimaru to invade konoha, it was apparently part of a plan formulated by Danzo.
In Manga 458 pages 9 and 10, Raikage figured out Danzo had a plot and it might have been to kill the 3rd hokage. In a way Danzo wanted power, I can see why Danzo would be the one to use the fox.