KHBbS My guess' [CONATINS HUGE SPOILERS]

[Edgeworth 0]

Since Vanitas is Pure darkness and Ventus is pure light,theres a scene where you see Vanitas fuse with Ventus which may have created Sora.

 

And since ventus won the battle,The light took over the darkness and Sora is Light and not darkness

 

My point is. Sora=Ventus+Vanitas

And if you think like : But Hey! You clearly see Vanitas dissapear after Ventus beating him. Remember Darkness and Light are eternal.

[optimuzxsmoke 0]

Sora was already born before this happened he was like 4 years old

[EaglesFan887 11]

Yeah. We know he was born already cause we see a cutscene with sora and riku at destiny islands with terra. And in the end, we see ven go in to not newborn sora but 4y old sora