The ninja world's reaction would be mixed. The younger generation might be more accepting and even see it as something cool. They grew up seeing Naruto and Sasuke as heroes, and their son could be seen as a symbol of a new era. But the older and more traditional ninja, especially the elders of the various villages, would be hesitant. They would worry about how this relationship and the resulting son would impact the long - standing political and social order. There could be whispers and rumors, and some might even try to undermine the son's growth and development out of fear of change.
Some in the ninja world would likely be shocked at first. The idea of Naruto and Sasuke having a son together goes against the traditional views of many. But those who are close to them, like their friends from Team 7, would probably be supportive. Kakashi, for example, might see it as a new step in the evolution of the ninja world's relationships. However, there would also be those who oppose it, especially from more conservative clans who might fear the implications of such an unorthodox union on their power structures.