idea 3 Son if Otsusuki Kaguya

yeah you read the title basically mc is reborn as the son of kaguya otsusuki.

Route 1 kaguya used something bullshit technique to see into the future and leaves the naruto verse while she's pregnant with her third son and goes to Ben 10 world where she meets azmuth and he helps her settle down somewhere seeing that's she's pregnant . mc will be friends with ben and gwen and is to watch ben on the request of azmuth since ben literally haves the most powerful weapon in the galaxy