Why not? Posted in Wiseguy's thread, here's yet another list to pore over (or ignore, whatever your fancy :bigthumbu)
Super Mario
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1. Mario - Confirmed
Everyone's favorite plumber from Brooklyn, he's confirmed and ready for action.
2. Luigi - Excellent
Mario's steadfast bro and one of the original 12, he's all but guaranteed to return.
3. Princess Peach - Excellent
With more recent games breaking Peach out of her normal damsel in distress role, she's due to return to Brawl ready to lay the smackdown again.
4. Bowser - Excellent
Ah, poor Bowser. He never seems to succeed with his stunningly similar sinister schemes (that's alliteration kids!), but perhaps he'll get some revenge when he most likely returns for Brawl--hopefully with some buffs to boot.
5. Bowser Jr. - Fair
As much as I personally dislike this little guy for singlehandedly usurping the Koopa Kids, I must admit his potential for being included is high and his moveset could be quite unique given his role in Sunshine.
The Legend of Zelda
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6. Link (Twilight Princess) - Confirmed
Confirmed and looking good, TP Link updates the classic OoT Link we all know and love from the previous SSB games.
7. Link (Wind Waker) - Excellent
This seems to be the best way to go as a replacement for Young Link in my book, as I am in the minority who absolutely loved WW's artistic style. Distinguishing graphics aside, WW Link had a slew of new items not seen in other LoZ games that could be used to further Luigify his moveset.
8. Princess Zelda - Excellent
Ah, here seems to be the hot button...OoT Zelda/Sheik, or TP Zelda? Seems to me that TP Zelda could combine some traits of OoT Zelda/Sheik from Melee: keep some similar magic moves (maybe graphically altering the 3 OoT spells to the light magic from TP), while adding some agile new moves with her rapier to complement her "previous life" (I don't mean that literally, I know my Zelda games, please put down the torches and pitchforks!) as Sheik. But what do I know, I'm sure not Sakurai.
9. Gannondorf - Excellent
Chances are the big guy is coming back in TP form, and hopefully with a moveset to call his own. Not that the bearer of the Triforce of Power minded being a clone or anything...
10. Midna w/Wolf Link - Good
Ferro De Lupe's fantastic moveset idea pushed me in this direction. Seems to me this would be a great way to add a recent LoZ character to the Brawl roster as well as provide a unique gameplay experience.
Pokémon
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11. Pikachu - Confirmed
The electric rat returneth. 'Nuff said.
12. Jigglypuff - Excellent
Sigh...despite a lack of importance to the series, Jigglypuff is most likely coming back, thanks to original 12 status.
13. Mewtwo - Good
Poor Mewtwo, he had such great potential for Melee, but the Nerf bat must've caught him early on. Here's hoping he returns with some of the suckage removed.
14. Red - Poor
What?!?!? You didn't pick a Pokémon as the new 4th rep for the series? You chose the generic trainer from Pokémon Red and Blue? Insanity...but perhaps not! Imagine a moveset centered around the six Pokémon a trainer is allowed to carry. Ground A attacks could be carried out by a fighting type Pokémon (mayhap the oft suggested Lucario) who is by your side by default. Air A attacks plus double jump and B up recovery could instantly call out a flying type (let's say Charizard, an original starter and fairly popular Pokémon) to your aid. The B special moves could be any variety of attacks based around a variety of Pokémon techniques. My point is, it seems a really creative moveset could be made by Sakurai and the Brawl team.
Donkey Kong
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15. Donkey Kong - Excellent
DK Jr. all grown up, Donkey Kong is coming back again, ready to show old Cranky Kong that he's definitely the real deal. That, and eat bananas.
16. Diddy Kong - Good
Diddy needs a little respect. Sure, he started as DK's sidekick, but he ended up saving the big lug eventually. He's helped whup K. Rool's posterior plenty of times, and even stopped a giant alien pig from trashing the planet! And even though DK64 was a bit of a snore, we can be happy it existed since it'll diversify Diddy's moveset. Hmm, a monkey with a jetpack, pistols and a guitar...what's not to love?
17. King K. Rool - Fair
Call him a cheap Bowser knockoff all you want, but K. Rool just may show his ugly mug to prove you wrong when Brawl arrives. I could see some interesting moves based on the costumes he's worn over the years: Kaptain K. Rool (pirate), Baron K. Roolentstein (mad scientist) and King Krusha K. Rool (boxer).
Starfox
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18. Fox McCloud - Confirmed
Like it or not, it's the Command version of Fox that's returning. We'll have to wait and see what changes are in store for the furry anthropomorphic Arwing pilot friend.
19. Krystal - Excellent
Dinosaur Planet, Rareware's last Nintendo hurrah, looked fantastic on its own, but then the Star Fox branding came along. But sordid stories aside, I suppose we'll take that as a good thing since Krystal is eligible for Brawl because of it. Her staff is what distinguishes her, and should provide for an interesting moveset. Oh, and not that I've seen it brought up yet, but I'd vote that her appearance be her original SFA appearance.
20. Wolf O'Donnell - Good
Every hero's gotta have their rival, and Fox is no exception. In the interest of adding villains to the Brawl roster, I've included fan favorite Wolf over Falco. Not knocking Falco, as he's a great charatcter in the Starfox world, but there are only so many spaces in the Brawl roster. I'd like to see the Brawl team give Wolf the same treatment Fox was originally given, i.e. "Let's make up some cool moves for him since he's not out of the cockpit much!" However, in order to play by Wiseguy's rules, we'll call Wolf a clone for now.
Kirby
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21. Kirby - Confirmed
The little placeholder sprite that could, Kirby returns yet again. Here's hoping he finds himself somewhere between his SSB pwnage and Melee's nerfed...nerfness...yeah. Moving on!
22. Metaknight - Confirmed
Holy cow, I've always wanted this one but wouldn't have bet on it happpening way back when. Thank you Sakurai for proving me wrong and adding a fantastic Kirby character! We've only glimpsed at what this whirling dervish of an anti-Kirby has in store for Brawl...
23. King Dedede - Excellent
Finally, some hammer based combat that doesn't involve two ****** Eskimoes tethered together! Given his penguiny villainous popularity (and being a Sakurai creation), don't be surprised if you get hit upside the head by a mallet-weilding penguin when Brawl finally arrives.
Metroid
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24. Samus/Zamus - Double Confirmed
Well, as cool as Zero Suit Samus's addition to the game is, it pains me that Sakurai has said she's a transformation instead of a wholly separate character. Oh well, at least Nintendo's favorite power suit weilding femme fatale is returning for Brawl.
25. Ridley - Excellent
Ridley's long overdue for a SSB appearance, and I think Brawl is when he'll finally get to rear his ugly head. Super intelligent and a space pirate dragon (does it get any better?), Ridley is just full of potential...for PAIN!
26. Dark Samus - Fair
First a metroid becomes part Samus, then Samus becomes part metroid. Ah, the circle of life. In any case, the Metroid series certainly deserves more reps despite having a really small pool of characters to pick from. DS, as stated amply in posts before this, is very much different from Samus herself, but I wouldn't be surprised if DS was a clone as opposed to having an original moveset.
F-Zero
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27. Captain Falcon - Excellent
The seemingly sole representation of his series, Falcon is most almost certainly returning for Brawl.
28. Samurai Goroh - Fair
I've always been a fan of Goroh for some inexplicable reason, so it's only natural I include him in my predictive Brawl roster. Plus, more villains are always a good thing. I could see a moveset that combines his brute strength with his katana skills...perhaps a clone of Falcon but with some sword attacks peppered in for Luigification?
Fire Emblem
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29. Ike - Good
Given what I understand to be his international popularity and his similarity to Marth, I'll side with the Ike folks here and nix Marth for Ike. But to be fair, I've yet to play a Fire Emblem game, so I'm fairly uninformed on this topic. It really seems to be an classic game vs. recent release debate, and I don't think I'm qualified to rightly choose between Marth and Ike, but I did anyhow.
30. Micaiah - Poor
I've yet to see this combination, so I figured why not? Given Melee's treatment of FE characters (Marth being the fan favorite and Roy being the advertisement for an upcoming game), I decided to follow suit and choose Micaiah as my second FE character, plugging the upcoming Wii FE (Ike being the international fan favorite...or at least known outside of Japan, anyhow). Plus, she's not another sword user, which seems to be a rather popular trend for Brawl characters...
Earthbound
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31. Ness - Excellent
Ness, being North America's only representative of the crazy cult hit Mother series and a member of the original 12, is almost guaranteed to make a return.
Yoshi
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32. Yoshi - Excellent
Bet you didn't see that one coming, eh? Yoshi's certainly coming back, given his status as a staple Mario-related character, his inclusion in the original 12, and the glimpses we've caught of a Yoshi's Island stage. For the record, YI>YS by an infinite degree. It's about time there was a YI stage instead of a YS one.
Wario
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33. Wario - Confirmed
It's about bloody time! Wario's here and ready to rock in his Wario Ware gear. We just need to see what his moveset is like outside of his, erm, unique Wario Waft.
Misc. Nintendo
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34. Pit - Confirmed
Another confirmed newcomer, the star of Kid Icarus and its little known Game Boy sequel has come out of the gates strong and looking good--props to Sakurai's team for such a cool looking reimagining. Along with Metaknight, Pit seems to be another fast and floaty newcomer.
35. Captain Olimar - Good
This idea had never even crossed my mind until reading the forums here, and you know what? It's grown on me. Sure, Pikmin wasn't a blockbuster franchise, but what would be more humiliating than loosing to a bunch of little sentient flowers led by a tiny commanding spaceman? Not much, I'll bet. Well, except for losing to...
36. Tom Nook - Fair
You'll know you're having a bad day when a tanuki slumlord throws furniture at you and breaks your legs with a golden shovel. And on top of that you'll still owe him thousands of bells on your mortgage. I won't say his odds of getting into Brawl are great, but he may be able to "persuade" his way in. With violence.
37. Balloon Fighter - Good
I've yet to try and wrap my head around a moveset for this guy, yet I'm convinced he's fairly likely to get in. The rumor of him being pulled from Melee, plus Bowserlick's awesome idea that he be restyled as a WWI pilot (complete with pulled up goggles and scarf) have convinced me he deserves a spot on my (most likely flawed) roster.
38. Jill - Poor
Ah, here's where the curve balls come. Made by Gamefreak and owned by Nintendo, Drill Dozer was a fantastic GBA puzzle platformer that was just oozing with personality, particularly the spunky heroine Jill. I'll admit her chances are pretty slim to nil, but I would consider it a surprise on the level of the Ice Climbers or Mr. Game and Watch. Besides, it's my list and I get to pick.
39. Ray Mk II - Poor
One last oddball Nintendo character that I don't think has been suggested yet in this thread. The Ray model Custom Robos are the flagship models for the series, with Mk II being one of the most recognizable thanks to his trophy in Melee. Again, this character has a very low likelyhood of getting in, but could potentially have a very unique moveset thanks to the huge number of weapons from the Custom Robo series that could be used. Here's hoping we see Ray get to use the dragon gun.
Third Party
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40. Solid Snake - Confirmed
I can actually recollect my confusion upon hearing the MGS communicator ring after the watching the Brawl trailer "finish" for the first time. Snake is the last character anybody would have guessed as having an appearance in a Smash Bros. game, and yet here he is, practically fitting right in. All I need to know to be happy is how his cardboard box comes into play...
41. Sonic the Hedgehog - Excellent
If you didn't see this one coming you probably had your eyes closed. Sega, Nintendo...we need the definitive answer to the age old Mario vs. Sonic rivalry, and I don't think a trip to the Olympics is gonna cut it.
42. Geno - Good
Let's hope a Geno reappearance happens. That way, when approximately 1.2 million SMRPG fanboys' heads explode and bajillions of copies of Brawl are sold, Square Enix and Nintendo will realize it's about time to make an official SMRPG sequel. Not that the M&L and Paper Mario games weren't fantastic (they most certainly were), but still. Besides, I'd love to see Geno's Final Smash be his Geno Flash...who wouldn't want to turn into a supernova shooting cannon?
Runners Up
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Just to mention it, I've heard some other fantastic suggestions that didn't quite make my cut, but are worth repeating yet again: Skull Kid, Commander Kahn, Mach Rider, Mii, Fawful, Megaman, Simon Belmont...the list goes on. Oh, and curse you Microsoft for owning the rights to Banjo-Kazooie. They could've been great in the SSB series.