I guess they can trade a Mario appearance in Wreck-It-Ralph 2 for a Sora appearance in Smash. But it's also possible that instead of Sora, they got Wreck-It-Ralph or Mickey for Smash. I'm pretty sure the video game character only rule was just for the Ballot so that people don't vote for a character that's so complicated to get the rights to or any character that doesn't feel right for Smash. Sakurai wanted James Bond in Melee but couldn't get the necessary rights. I'm sure that if Disney offered Wreck-It-Ralph, Mickey, Elsa, Donald, Goofy, Hercules, Aladdin, Tron, Jack Skellington, Captain Jack Sparrow, Tinker Bell, Cinderella, Snow White, Buzz Lightyear, Darth Vader, Iron Man, or any popular Disney character and everyone needed to license that character agreed to it, Sakurai may be happy to put the character in Smash. But if he refuses the likes of Mickey Mouse, it's not very likely for him to put Sora in because Sora is friends with Mickey and has Mickey's logo on his Keyblade. Sakurai needs to be open to the idea of Disney properties for Sora to be in Smash.