Hm... Perhaps I worded it wrong.
I'm not really talking about who "deserves" to be in the game, or who I "want" to be in the game. I'm taking a very arbitrary and buisness-like viewpoint when I say that I believe Sora is a likely choice for Sakurai and Nintendo to choose as another 3rd party character.
Especially since Megaman, everyone's favorite 3rd party char other than Sonic, has actually lost popularity with the masses. In fact, Capcom has already decided not to make a Megaman game for the Wii because of this. Megaman's creator has come out and said he would love to make another game for the Wii, and he has ideas, but Capcom doesn't want to put too much into Megaman anymore because people are bored.
So does anybody have any similar arguments as mine as to why Sora is or is not a likely candidate?