we said zero suit was an extension of samus a few times already @_@
and by the Sora comment, Sora is the name of the team working on SSBB, and in a Famatsu article, the director said "the team recently finished a major blockbuster game, but revealing the name of the team would give it away"(paraphrased)
That would lead one to believe the team worked on KH2, and Nomura is working on it too, and Nintendo's getting squenix support on GBA, DS, and Wii, so it's possible we'll see, say, Cloud, appear in SSBB.