"only exceptions to the rule".
I really hate it when people say crap like this. THERE IS NO RULE.
If Sakurai wanted to advertise Mewtwo and/or Roy to the public with the notion of "look who's back!" to create hype for the game, them being unlockable (assuming, of course) would not deter that.
I agree with this.
As far as made up rules for newcomers in the smash 4 trailer, this is what I had in mind (no particular reveal order):
1. Mac: A boxer would be a great addition to the roster. And Namco's got experience with boxers in fighting games.
2. Takamaru: He seems like an obvious pick for a retro rep, if it helps his chances he has a mini game in Nintendoland. His chances are good but any other retro rep could get in over him (Mach Rider, Lip, Muddy, Prince Sable etc.).
3. A female rep? Not that a "female rep" should matter but a lot of people picked Palutena. She would be my 2nd lady pick as well, other then her I don't know any other female character Nintendo has that would be a great addition besides her, Medusa, Viridi, Lip, Bubbles, Daisy, Dixie Kong, Rosalina (if she has ice powers(Rosalina's Ice World stage from MK7) and Luma's), Captain Syrup (1st pick), or a female from Fire Emblem (don't know anything about FE). What about that girl from that horror GameCube game? It was called Eternal Darkness?
4. A villan? Not sure. Either K. Rool, Syrup, Hades (I really want Hades), Ridley, Deathborn, or Porky in his mech from Earthbound.
5. I was thinking about if they add not one but two new hardware characters this time around One for the Wii U: Monita, and AR Man (that yellow box) for the 3DS.
Monita:
AR Man:
They would be good surprise wtf choices, I don't think the Mii would be a good surprise choice unless they go all out for the Mii rep and let us create move sets for whatever Mii we use and use and color edit costumes.
And that's it. I didn't add a 3rd party because there's no guarantee we'll get one this time around. Also I'm not trying to set myself up for dissapointment when ??? doesn't make the cut. *points at Mega Man* he's not my 3rd party choice btw.