Late, but I'll be honest, it is literally the most insulting end of all ends of the whole series. Like...for real, I have always wanted Jin Kazama to be in Smash since Smash 4 was in development. Instead,
Guess he's also a dead dream now like with Waluigi [whose an Assist trophy since Brawl]
Apparently, Sakurai and his team must've either...
A: saw through the mere fangame so he went for the KH1 Sora
or B: ...likes his Sora pure of heart and untainted by darkness or "the edge"...whatever people called it...