Sorry to bust you nay sayers's bubbles.
Sakurai: "You may even see some that only the most dedicated fans will recognize."
So characters like Stafy, Demille, and the Exclamation Warriors have a bigger chance than we thought. If you don't want kiddy/cute characters that "suck" then go play Halo. Me and true Brawl aficionado's will welcome these awesome, unique characters with open arms.
Well, the only problem with Stafy is he just isn't the type of character who can fight amongst others in Brawl. I can see Demille and the Exclamation Warriors in easily, but not Stafy. He just doesn't seem the type of character to be able to fight, honestly, compared to many other characters that should be in like Takamaru, Skapon, Ridley, Krystal, etc. I see him more as an assist, or maybe playable in the sequel to Brawl when Sakurai gets all the characters with high potential at being completely original and awesome.
There should be 2 smashes: The Japan only one, with all the characters who everybody seems to love, and the Brawl that I am dying to get my hands on, the one with all the classics that people remember, like Mario and Link. The Smash that I want Ridley in.
Wait, I don't get you, since when will Smash be overloaded with Japanese only characters? Ridley is most likely going to be in, and so will every other character everyone wants like Krystal, King Dedede, or hell, even Sonic has a very high chance in Brawl despite me destesting it. Brawl is most likely going to have a huge roster with a lot of newcomers, what makes you think that characters like the red Exclamation Warrior, Takamaru, Skapon, or Demille is going to hurt Brawl in any way when it just adds to the experience? And even then, there's still a lot of spots left, there's still going to be a lot of characters from many different series despite Japan Only or not (I highly doubt Sakurai even cares about that).