I believe that Pokemon Trainer, Zero Suit Samus, and Wario will rise on the tier list.
Pokemon Trainer has gone from being the laughing stock of anything recovery (Lawl Ivysaur) to having decent, if not good tournament results thanks to a key few players. His tournament "potential" is significantly greater than that of certain characters in his tier or in the bottom of the one above.
I believe the general consensus was that Zero Suit was ranked pretty low anyways on this tier list, no? I don't think it's going to be a surprise when we see her move up. Her tournament results are pretty kickass and she's really taken over the position of "dark horse" in the tournament.
Wario....well, it's Wario. Everyone and anyone loathes playing against Wario. His air movement, strong attacks, reliable kill moves, tournament results, and few weaknesses really compensate for his few weaknesses. And seriously, when is a good Wario going to get grabbed? Uhh, almost never, that's when. (Wow, I just answered my own rhetorical question. Yay me >_>)
On the slippery slope to Lower Tier Land are Bowser, Donkey Kong, and Mr. Game and Watch.
Bowser....okay, nobody plays him in tournaments anyways, so how his current position is justified, I don't know. Sure, he has a few minute little "tricks" up his sleeves by grabbing everything with his grab fetish, but seriously, WHO has a problem playing against Bowser? Do you get SCARED when you see a Bowser opponent?
I have NO idea WHY Donkey Kong is SO high up. Donkey Kong's attacks are so telegraphed in advance, just like Zelda. I mean, the BAir is scary, yes, but once you realize he's going to approach you with it, it's really easy to get away from its harm. A DDD takes him right out of the tournament scene, and I have no idea why a character with such a crippling match-up and/or extremely hard time with other characters is high tier. DK is high-mid tier thanks to his range, strength and move quickness, but nowhere near the likes of ICs, Pika, and Pink Blob of RediWhip.
Mr. Game and Watch is good. He makes me respect turtles all the more. In fact, I may possibly be developing some sort of odd turtle fetish thanks to this strange little man and his strange little ways. Sadly, he's such a paper-thin (LOLpun) character. No ATs.....no speciality...just strong and hits like a freaking bulldozer on crack cocaine driven by a hooker named Shakweefria.
So thank you, strange little man, for the increase in my "want to stalk" for turtles. I applaud your efforts.