What is he planning?
take over his body
i could be overlooking something, but i'm still trying to make sense out of why Momoshiki would give him that seal after trying to kill him multiple times earlier.
It doesn't make much sense. It is merely a convenient plot device to boost boruto's strength. Of course they might throw in the cliche he wants to use or steal boruto's body story in there.
At this rate this manga will be worse than bleach(post aizen arc).
I think you reached that conclusion too quickly based off of insubstantial evidence considering this is the first chapter and not many details have been given away. Who knows what the seal truly does...
What is he planning?