Minato and Kushina: “Happy Birthday! Make a wish!”

Naruto: “I hope my mother will give me a brother.”

Kushina: “Huh???”

Minato: “Why not have a younger brother?”

Naruto: “Because if it were my elder brother, I would be as gentle and powerful as Big Brother Itachi, and if it were my younger brother, I would definitely be as stupid as Sasuke.”

…

What kind of changes will the traveler Ren Ming become Naruto bring to the Naruto world?