Board Thread:Naruto Discussions/@comment-1512913-20160606161440/@comment-734582-20160611131645

Namikazenaruto9 wrote: Does that means she was overthrown and that she was preparing to return to power?? Doubtful.

Judging solely from the Manga and Boruto and The Last movies, it seems that the original plan was to harvest the Shinju and transform it into chakra edibles. Kaguya was sent to do this on earth. It also seems Kaguya changed her mind on Earth and ate the fruit instead. She seems to have realized it would be treason and so prepared to fight not just Momoshiki and Kinshiki, but essentially their entire homeworld.

Kaguya is the leader of the otsutsuki, but it's not clarified (at all) whether the Otsutsuki have somehow become a single-clan race or whether it was just one of the royal clans.

As to the anime, she apparently arrived alone and expected the others to come shortly after. It seems that the same is still true as in the manga, but here she seemed to expect them as reinforcements first and as enemies later.