We still have no idea what happened....

[CrimsonReaper]

to hagoromo's brother??!

 

[I'm stupid real stupid]

He works in the Ramen Shop in Konoha...i belive he goes by "Teuchi" now

OT - He is the Reaper Death Ghost

 

[ANiMUS]

No one does. Kishimoto abandoned him along with Kaguya's motive

 

[Legend Slayer]

Perhaps kishi is saving him as the villain for part 3

 

[TenthHokagexRamen]

Thats what part 3 is for and why kaguya needed an army of fodder zetsus.