Top Ten Reasons Why Sora Should Never Be In a Super Smash Bros. Game: 22 items ranked by popular vote. Browse more in Franchises.
It will inspire Disney to get their hands on the series and acquire Nintendo in the future if he got in, like they did with Marvel and Lucasfilm.
Kingdom Hearts fans would try to beg for other characters from the franchise, even request Disney characters to be in the game.
Thus, the requirement of a third-party guest has to originate from a video game first and not from a movie, TV show, et cetera.
Knowing the other characters, Sora's moveset won't be that original and a giant key instead of a sword or something is just stupid.
Sora appearing will do nothing but inspire crossover fans to ship him with the other Smashers, creating rather disturbing het or yaoi pics that we don't want.
And since Kingdom Hearts involves Disney, Sora's final smash would have to involve Donald and Goofy, or even summon Disney characters or have Disney characters as trophies.
It increases the chances of Nintendo characters or other characters in the game to guest star in a Kingdom Hearts game