Board Thread:Theories and Speculation/@comment-27725840-20170731214952/@comment-5085906-20170804215530

I actually wouldn't be surprised if he was a synthetic human made by Naruto's and Sasuke's DNA. The main motif of the Naruto Gaiden and Next Generations seems to be parents and their children. We have the obvious Naruto/Boruto, Sasuke/Sarada, etc. dynamic then we have Shin and his clones, Sumire/her Dad and then Sumire/Nue, Momoshiki/Kinshiki in the manga and novelization and we have Daimyo/Tento in the current manga arc. Plus, if that was the case, then we would have a chance to see Team 7 fight an enemy that every single one of them can relate to in some weird way - he would be Boruto's and Sarada's half-brother while Mitsuki would be able to relate to him as he is synthetic himself.

And this would also indirectly satisfy all those fans that wanted Naruto and Sasuke to go gay for each other which is something I never understood.

The rest of OP's speculation, though - I doubt it. I mean, Katasuke seems to be a good guy. He was just being controlled during the events of the Momoshiki arc. And creating a genetically enhanced human by tissue harvested by the currently two strongest human beings in the series OUT OF SPITE seems quite weak of a reason.