The definitief proof that Kaguya was always in Kishimoto's mind.

[Uverdore9]

Nice find.

 

[FemmeFatale]

Yes and No
Kaguya herself was probably in his mind
But not connected to Naruto.

 

[Warlocks]

jubi=kaguya so she was always in Kishimoto's mind but he did poor job on her