Spoilers:
>Naruto and Sasuke fight him
>Kawaki will be there with them
>oro isn't there to help
>Kawaki will be the one who kills him
>get a seal from him
>oro is nowhere to be seen
Its interesting that Momoshiki can see fate while on the otherhand Hamura and his clan have the power to see the future through prophecies , dreams and visions. How does Toneri know his name? unless Hamura had records and strong intel on the Ōtsutsuki Clan 's harvest rituals ,maybe even interactions of some.