Board Thread:Theories and Speculation/@comment-1512913-20150609203752/@comment-5936871-20150625174006

Momoshiki. He's the dude Gaiden is referencing, and the person Kaguya created her White Zetsu Army to oppose, and the man that made her want to protect Earth so much. That's what I think anyway.

@Action If you look at the new trailer, the new villain is clearly a member of the Otsutsuki Clan with a Byakugan, Rinnegan, and possibly TSBs, and he has a partner who has a Byakugan and Rinnegan too.