No, no and never.
You really have to think it like his:
1.Nintendo is letting three maby four characters from other companys than Nintendo.
2.They are most likely to chose companies that worked well or is now on good terma whit them, that is: Capcom, Konami, Sega and Square.
3. Hideo Kojima is probably the reason that Nintendo is taking other company charcters since he begged them to include Snake, and it´s most likely that no other Konami characters will appere in SSBB.
4. Resoning from that they will have one character from each company if the get permisson and most likely thosse characters will be the companys most popular that is: Sega/Sonic, Capcom/Megaman and Square/?.
5. Square is unknow cuse the main characters have been changin ower time, but shurely if they get a chanse they will include a character from the series (or game) that saved them from bankrupsy (sp?). Saying this will probably mean they give something that has been in the FF series for a long time: Back Mage, Fighter (both ideas still live) or a Moogle. Personally I think they´ll include a Black Mage, the class has been getting some spotlight lately in Mario: Hoops 3 on 3, and Square has alwas had somekind of BM in the FF series...
(I don´t want to start and debate abute this so plz...)
6.One of the requirements is to have been on a Nintendo console, well Sora has been on a handheld, giving him a 0.01% while the others (BM, Fighter and Moogle) have abute 30% each...
Conclution: Sora has a next to never (if even that) chance to be included in SSBB.
And no, sora shuld not be in any SSB.
Exuse gramatic errors.
EDIT: Oh, this is only my opinion not real facts that I know is real...